Release Notes for DDSM

Version: 6.2.3-25426 Update 3

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Important Note

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to manually update it. Only Synology NAS with DSM 6.2.3 installed can be updated to this version.
   • The update is not available in your region yet. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Compatibility & Installation

1. Photo Station must be updated to version 6.8.14-3501 or above to be compatible with this update.

What's New

1. Enhanced NFSv4 connection stability.
2. Increased the maximum number of IP camera channels on FS6400 to 150.

Fixed Issues

1. Fixed an issue where support ticket submissions might fail in a certain version of Google Chrome.
2. Fixed an issue where Windows 10, version 2004 virtual machines might fail to power on when users select UEFI as the firmware.
3. Fixed an issue where there might be network disconnections on Virtual DSM.
4. Enhanced the stability of SSD caches when multiple processes are accessing the same cache at the same time.
5. Fixed an issue where CMS managed servers might not connect to the CMS host after they restarted.
6. Fixed an issue where disks in Resource Monitor performance charts were not displayed in the correct sequence. Affected models include:
   • 21-series: DS1621+
   • 20-series: FS6400, DS1520+, DS920+, DS720+, DS420+, DS220+
7. Fixed an issue where when users access files on DSM using Windows software via SMB, system performance might be affected. This is because of Windows software's continuous attempts to access the shared folders to which it has no permissions.
8. Fixed an issue where Windows File Explorer might not update file deletion or removal in real time when folders are mounted via SMB.
9. Fixed an issue where the system might not report the power status correctly on SA3200D.
10. Fixed an issue where the setting pages after first-time DSM installation might not launch on Synology NAS models with multiple LAN ports.
11. Fixed an issue where users were not able to empty the recycle bin of the "usbshare" shared folder.
12. Fixed an issue where administrators were not able to change the "User must change password at next logon" setting via Windows RSAT.
13. Fixed an issue where domain users could not be added to built-in groups via Windows RSAT.
14. Fixed an issue where enabling the "Collect debug logs" option for SMB might result in excessive system space usage.
15. Fixed an issue where the system might send incorrect port forwarding notifications after a restart.
16. Fixed an issue where SHA-1 certificates might disappear when users click "Upgrade certificate".
17. Fixed an issue where DSM might block users' IP addresses and create excessive logs when they tried to sign in after re-installing DSM.
18. Fixed an issue where incorrect drive compatibility information was displayed after drive migration.
19. Enhanced the stability of network interface cards on certain models.
20. Fixed an issue where links in password reset emails did not work when the URLs exceed the maximum length.
21. Fixed an issue where packages did not update automatically due to dependency problems.
22. Enhanced SAS controller stability during system shutdowns.
23. Fixed multiple security vulnerabilities. (Synology-SA-20:26)
24. Supports Let's Encrypt ISRG certificates.

Version: 6.2.3-25426 Update 2

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Important Note

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to manually update it. Only Synology NAS with DSM 6.2.3 installed can be updated to this version.
   • The update is not available in your region yet. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

What's New

1. Added support for Synology Expansion Unit FX2421.

Fixed Issues

1. Fixed the issue where a DS920+ or DS720+ might not enter hibernation when its connected expansion unit has entered deep sleep.
2. Fixed the issue where drive status LED indicators on a connected expansion unit might not work properly when the expansion unit wakes up from deep sleep.
3. Fixed the issue where daylight saving time might not display correctly in certain time zones (e.g., Dublin, Casablanca).
4. Fixed the issue where mounted remote shared folders on a Synology NAS may cause volumes to operate improperly or the Synology NAS unable to shut down in certain scenarios.
5. Fixed the issue where the system might incorrectly prompt "drive slot disabled” notice when a DS413 or DS213+ wakes up from deep sleep.
6. Enhanced the performance in writing a large number of files to a Btrfs volume with RAID 1 configuration using hard disk drives (HDD).
7. Fixed the issue where Synology Universal Search and Synology Drive might consume excessive CPU resources when the option "Utilize unused memory as database cache to improve (search) performance" has been enabled.
8. Fixed the issue where domain-related services might not resume working because the update of domain data could not be complete.
9. Fixed security vulnerabilities (Synology-SA-20:18).
10. Fixed the issue where the system might incorrectly prompt IP address conflict warning if a network interface card is attached to Synology NAS and the option "Reply to ARP requests if the target IP address is a local address configured on the incoming interface" is disabled.
11. Fixed the issue where the status of an Ethernet port might not be detected properly when the Ethernet port is not connected to a network cable while Open vSwitch has been enabled.

Version: 6.2.3-25426

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Important Note

1. The update is expected to be available for all regions within the next few weeks, although the time of release in each region may vary slightly. If you want to update to the latest version now, please go to Download Center and manually update your DSM.
2. This update includes fixes to the below issues mentioned in 6.2.3-25423.
   • Fixed the issue where the automatic mounting of encrypted shared folders might result in the loss of indexing rules and the failure of the search function.
   • Fixed the issue where the Synology NAS equipped with NVMe device might be woken up from hibernation by the update of NVMe device's health status cache.
3. This update will restart your Synology NAS.
4. Removed the support for Google Cloud Print in DSM 6.2.3 and above.
5. To avoid the interruption of iSCSI service, the automatic DSM update and your power schedule to shut down may not be executed as expected if there are any active iSCSI sessions.
6. Removed TWNIC from the list of DDNS service providers on DSM 6.2.3 since TWNIC will stop accepting new registrations for DSM as of Jul. 1, 2020. Your current TWNIC DDNS services can still be used and edited but will not be available again once deleted from DSM.
7. This is the last major DSM version (6.2) that supports the video conversion to .flv and MPEG-4 Part 2 on certain models (RS814, RS214, DS414, DS414slim, DS414j, DS216se, DS215j, DS214+, DS214, DS214se, DS213j, DS120j, DS119j, DS115, DS115j, and DS114) in consideration of the termination of Adobe's support for Flash Player by the end of 2020.

What's New in DSM 6.2.3

1. Thin Provisioning LUN will become protected upon insufficient volume space, preventing clients from writing data to the LUN while allowing read-only access to the existing data.
2. Added support for domain users to sign in to DSM using a UPN (user principal name) via file protocols (including SMB, AFP, FTP, and WebDAV).
3. Added support for the option of forcing password changes for importing local users.
4. Enhanced the compatibility of the imported user list, providing clearer error messages when the imported file contains syntax errors.
5. Added support to record only the events of SMB transfer selected by the user, providing transfer logs that meet the requirements more closely.
6. Added support for client users to monitor the changes of subdirectories under shared folders via SMB protocol.
7. Added details of desktop notifications to facilitate users' timely responses.
8. Added support for external UDF file system devices.
9. Added support for the Open vSwitch option in a high-availability cluster.
10. Added support for IP conflict detection, providing logs and notifications accordingly.
11. Added support for Let's Encrypt wildcard certificates for Synology DDNS.
12. Added support to waive the need of DSM login again through an HTTPS connection after a change in client's IP address.
13. Added support for hardware-assisted locking for Thick Provisioning LUN on an ext4 volume.
14. Added support for customized footer message on DSM login pages.

Fixed Issues

1. Fixed the issue where certain cities might be mapped to incorrect time zones.
2. Fixed the issue where LDAP users could not be notified of the upcoming password expiration.
3. Fixed the issue where the upload of LDAP certificate could not overwrite the original one with the same file name.
4. Fixed the issue where the application permissions settings might not be applied properly to the Domain Users group when such group in Windows AD domain was named other than "Domain Users".
5. Fixed the issue of inaccurate time of usage history in Resource Monitor.
6. Improved system responsiveness by reducing the latency of the Btrfs file system in certain scenarios.
7. Fixed the issue where SNMP did not provide the indices of Disk and RAID correctly.
8. Fixed the issue where the recycle bin of an encrypted shared folder might not be emptied properly.
9. Enhanced the DSM login performance for multiple concurrent logins.
10. Adjusted the personal notification mechanism to comply with the latest Gmail API.
11. Fixed the issue where the iSCSI service might be interrupted when the LUN backup task is stopped.
12. Removed the function of expanding the capacity of a block LUN.
13. Fixed security vulnerabilities (Synology-SA-19:33, Synology-SA-19:35, Synology-SA-19:37, Synology-SA-20:06, Synology-SA-20:18).

Known Issues & Limitations

1. Due to Apple's new security requirements for trusted certificates, after a DSM update from an older version, the access to DSM via HTTPS using Google Chrome on a client device running macOS 10.15 might fail because of a certificate error. You may renew the default certificate on the Synology NAS to resolve this issue.
2. To run Centralized Management System (CMS) on Surveillance Station after updating to DSM 6.2.3-25426, Surveillance Station 8.2.7 or above is required.

Version: 6.2.3-25423

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Important Note

1. This update has been recalled on May 13, since the automatic mounting of encrypted shared folders might result in the loss of indexing rules and the failure of the search function. The issue has been fixed in 6.2.3-25426.

Version: 6.2.2-24922 Update 4

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Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed the issue where the LED indicators on the drive slots of DS118, DS218, DS218play, DS418, DS418j, and RS819 might not work properly.
2. Fixed the issue where the certificate might not work properly when the renewal has failed.
3. Fixed the issue where manually renewed certificates may not be applied to certain services.
4. Fixed a security vulnerability regarding Net-SNMP (CVE-2018-18066).
5. Fixed multiple security vulnerabilities regarding Nginx (Synology-SA-19:33).
6. Fixed multiple security vulnerabilities (Synology-SA-19:37).

Version: 6.2.2-24922 Update 3

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Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

What's New

1. Updated the protocol of Let's Encrypt to ACME V2 to enhance the stability of the registration process.

Fixed Issues

1. Fixed the issue where the system might be unable to install a package during first time installation.
2. Fixed the issue where shared folders could not be accessed via the SMB protocol if the smb.conf file was manually modified for Final Cut Pro X.
3. Improved the performance of the SMB protocol by reducing CPU usage when Synology NAS joins a domain.
4. Fixed the issue where Integrated Windows Authentication (IWA) might not work again if the protocol has been disabled before.
5. Fixed the issue where the LED indicators on the drive slots of RS4017xs+ and RS2818RP+ might not work properly.
6. Adjusted the notification mechanism to comply with the latest Gmail API.
7. Fixed the issue where duplicate entries of the same login event might be recorded at Log Center.
8. Fixed the issue where applying non-default date formats at personal settings might result in additional date information being displayed.
9. Fixed the issue where adding a Synology NAS to CMS host might result in a frozen "Checking" status and the device would not be added successfully.
10. Fixed the issue where the storage capacity of a volume could not be expanded after it was migrated to a new Synology NAS with its corresponding SSD cache.

Version: 6.2.2-24922 Update 2

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Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.
3. In response to Gmail API changes, your DSM needs an update to this version to continue the functionality of sending notifications via Gmail. If you wish to skip this update, or if your Synology product model is not eligible to update to DSM 6.2, please refer to the following article which will guide you through the manual configuration: How to use Gmail SMTP server to send emails for DSM

What's New

1. Optimized the repair mechanism of RAID 6.
2. Enhanced the stability of Btrfs file system.
3. Enhanced the performance of the scheduled task to automatically empty the recycle bin.

Fixed Issues

1. Adjusted Gmail notification authentication mechanism to comply with the new Gmail API.
2. Fixed the issue where the public sharing link function might not work properly.
3. Fixed several issues which might result from the defective NVMe SSDs, such as system startup failure.
4. Fixed the issue where Google Chrome might autofill usernames and passwords into incorrect fields.
5. Fixed the issue where the encrypted shared folders could not be accessed under certain conditions.
6. Fixed the issue where the encrypted shared folders could not be mounted properly after system startup.
7. Fixed the issue where, after the restart of Synology NAS or the configuration of Synology High Availability, the domain service powered by Directory Server for Windows Domain might not work properly.

Version: 6.2.2-24922 Update 1

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Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed an issue where available DSM updates may not be displayed in Control Panel and Notification.
2. Fixed an issue where domain users may not be able to change their passwords when logging in through DSM.
3. Fixed an issue where joining DSM to LDAP server might fail.
4. Fixed an issue where accessing a path with special characters after enabling Mac special characters feature may result in permission error.
5. Fixed an issue where some packages' functions might fail due to file permissions being reset by Package Center.
6. Enhanced the stability of Btrfs file system under certain high I/O loading conditions.
7. Fixed an issue where there's a small chance that UPS might be disabled after rebooting.
8. Fixed an issue where reconnecting via CIFS in File Station might fail under unstable connection environment.
9. Changed the default option for system date and time format settings to YYYY-MM-dd and HH:mm respectively.
10. Fixed a security vulnerability regarding Samba (Synology-SA-19:23).
11. Fixed a security vulnerability regarding libxslt (CVE-2019-11068).

Version: 6.2.2-24922

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Important Note

1. This update was re-released on Apr. 29 to fine-tune certain functionality and usability.
2. The update is expected to be available for all regions within the next few weeks, although the time of release in each region may vary slightly.
3. This update will restart your Synology NAS.

What's New in DSM 6.2.2

1. Added the new Smart Update function and adjusted the update mechanism of DSM.
2. IHM now supports 14TB IronWolf and IronWolf Pro drives.
3. Added firmware update function of SAS controller on certain SAS models.
4. Added knowledge base article recommendations in the Support Center to help users with easy troubleshooting.
5. Domain users can now change their passwords upon DSM login when their passwords expire.
6. Added support for Integrated Windows Authentication.
7. Added support for Google LDAP services.
8. Added the new Low-Capacity Write function, which resumes LUNs from read-only status temporarily when a volume is running out of space.
9. Users can now select which advanced features to enable during iSCSI LUN creation.
10. Adjusted the warning mechanism in iSCSI Manager for insufficient volume space.
11. Added function to schedule the snapshot rotation in iSCSI Manager.
12. Added support for the configuration of date and time formats in personal account settings and Control Panel.
13. Supports SSD compatibility check on XS and FS series models.
14. Adjusted the notification mechanism for bad sectors.
15. Improved the calculating accuracy of SSD cache hit rate.
16. Users can now get a Let's Encrypt certificate automatically upon adding a new Synology DDNS.
17. Changed notification badges from numbers to red dots and modified display rules.

Fixed Issues

1. Fixed an issue where usage history may not show in Resource Monitor on certain models.
2. Fixed an issue where files cannot be re-uploaded after being deleted on macOS 10.13.
3. Fixed an issue where encrypted Excel files cannot be opened in Microsoft Office 2016 simultaneously on multiple macOS devices.
4. Shortened the time needed for domain and LDAP authentication via AFP.
5. Improved the stability of mounting exFAT external devices (exFAT package required).
6. Improved the stability of NFS protocol connection.
7. Improved the stability of Snapshot Replication when moving a large number of directories.
8. Enhanced the stability of Btrfs file system under certain high I/O loading conditions.
9. Enhanced vulnerabilities protection from KPTI to Spectre and Meltdown Protection for improved security. Applied models:
   • 18-Series : DS218+, DS418play, DS718+, DS918+, DS1618+, DS3018xs, RS2418+, RS2418RP+, RS2818RP+, FS1018
   • 19-Series : DS1019+, DS1819+, DS2419+, RS1619xs+
10. Fixed multiple security vulnerabilities regarding Linux kernel (CVE-2017-13168, CVE-2018-19824, CVE-2017-15649, CVE-2018-14634, CVE-2018-17182, CVE-2018-10853).
11. Fixed multiple security vulnerabilities regarding OpenSSL (CVE-2018-0732, CVE-2018-0737, CVE-2019-1559, CVE-2018-0734, CVE-2018-5407).
12. Fixed multiple security vulnerabilities regarding Spectre & Meltdown (Synology-SA-18:01).
13. Fixed multiple security vulnerabilities regarding OpenSSH (CVE-2019-6109, CVE-2019-6110, CVE-2019-6111, CVE-2018-20685).
14. Fixed a security vulnerability regarding SQLite (Synology-SA-18:61).
15. Fixed multiple security vulnerabilities regarding Samba (Synology-SA-18:47, Synology-SA-18:60).
16. Fixed multiple security vulnerabilities regarding Intel TXE and ME (Synology-SA-17:73).
17. Fixed multiple security vulnerabilities regarding Speculative (Synology-SA-18:23).
18. Fixed multiple security vulnerabilities regarding L1 Terminal Fault (Synology-SA-18:45).
19. Minor bug fixes.

Version: 6.2.1-23824 Update 6

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Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS if you are using the models listed below.
   • Plus Series : DS218+, DS718+, DS918+, DS1019+
   • Value Series : DS418play

Fixed Issues

1. Fixed an issue where abnormal reboot while converting SHR type or expanding SHR capacity may cause the storage volume not to be properly mounted.
2. Fixed an issue where the completion of Snapshot Replication under high load environment may result in abnormal reboot.
3. Minor bug fixes.

Version: 6.2.1-23824 Update 4

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Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed a security vulnerability (Synology-SA-18:64).

Version: 6.2.1-23824 Update 3

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Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed a security vulnerability regarding Netatalk (Synology-SA-18:62).

Version: 6.2.1-23824 Update 2

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Important Note

1. This update will restart your Synology NAS.

Fixed Issues

1. Fixed an issue where the SSD cache auto-protection mechanism was not able to start automatically.
2. Fixed an issue where installing package creates unnecessary package backup that occupies system space.

Version: 6.2.1-23824 Update 1

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Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Improve Package Center system mechanisms to enhance user experience.
2. Enhanced the ext4 file system stability.
3. Fixed an issue where external hard drives of WD My Book might not be recognized if DSM is rebooted while the drives are in hibernation.
4. Fixed an issue where Microsoft Office files might not be renamed in Windows File Explorer through SMB protocol.
5. Fixed an issue where the HASP package might not be usable after upgrading to DSM 6.2-23739-2 and DSM 6.2.1-23824.
6. Fixed multiple security vulnerabilities regarding Linux kernel (Synology-SA-18:44).
7. Fixed a security vulnerability (Synology-SA-18:55).
8. Fixed a security vulnerability regarding wpa_supplicant (CVE-2018-14526).
9. Fixed a security vulnerability regarding OpenSSH (CVE-2018-15473).
10. Fixed multiple security vulnerabilities regarding Samba (CVE-2018-10858, CVE-2018-10919).

Version: 6.2.1-23824

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Important Note

1. The update is expected to be available for all regions within the next few weeks, although the time of release in each region may vary slightly.

2. After system upgrades to DSM 6.2.1, the HASP package will not be supported.

3. This update will restart your Synology NAS.

4. For the following models, DSM 6.2 will be the last upgradable version. DSM 6.2 will continue to receive critical and security updates until June 2023 after the official release. Please refer to the DiskStation Manager Life Cycle section in Synology Security White Paper.

   • XS Series : RS3412xs, RS3412RPxs, RS3411xs, RS3411RPxs, DS3612xs, DS3611xs
   • Plus Series : RS2212+, RS2212RP+, RS2211+, RS2211RP+, RS812+, RS812RP+,　DS2411+, DS1812+, DS1512+, DS1511+, DS712+, DS412+, DS411+II, DS411+, DS213+, DS212+, DS211+, DS112+
   • Value Series : RS812, RS212, RS411, DS413, DS411, DS213, DS212, DS211, DS112, DS111
   • J Series : DS413j, DS411j, DS411slim, DS213air, DS212j, DS211j, DS112j
   • Others : NVR216, NVR1218, DDSM

What's New in DSM 6.2.1

1. Space reclamation speed of legacy Advanced LUNs is now adjustable.

2. You can now convert legacy Advanced LUNs into new Advanced LUNs, which come with instant snapshots and performance improvements.

3. Added password strength meter for creating and modifying passwords.

4. When you install or upgrade your DSM version through the Internet, it will now automatically be upgraded to the corresponding DSM version with critical and security updates. The following models are not available due to hardware performance limitations.

   • 11 series: RS411, DS411slim, DS411j, DS411, DS211j, DS211+, DS211, DS111
   • 12 series: RS812, RS212, DS212j, DS212+, DS212, DS112j, DS112+, DS112
   • 13 series: DS413j, DS413, DS213j, DS213air, DS213+, DS213
   • 14 series: RS814, DS414slim, DS414j, DS414, RS214, DS214se, DS214+, DS214, DS114
   • 15 series: RS815, DS215j, DS115j, DS115
   • 16 series: DS216se

Fixed Issues

1. Fixed an issue where users may not be able to delete snapshots when the volume is full.

2. Fixed an issue where Windows may falsely detect an error on an exFAT format USB drive after it is used as the backup destination of Hyper Backup.

3. Improved Snapshot Replication package stability.

4. Fixed an issue where incorrect or incomplete update information may be displayed in the DSM Update tab.

5. Fixed an issue where a single RAID with over 24 drives may fail to assemble a RAID 5/6/F1 or SHR 1/2 storage pool.

6. Fixed an issue where boot failure might occur if the system was rebooted during the conversion process from RAID 5 to RAID 6.

7. Enhanced the compatibility of certain drives on Synology NAS and Expansion Unit models.

8. Fixed an issue where local users may fail to log in via SMB on specific Windows versions after adding their NAS to a Synology Active Directory domain.

9. Improved Windows client's clock synchronization with DSM after it is added to a Synology Active Directory domain. Upgrading Active Directory Server to version 4.4.5-0077 or above is required.

10. Modified HDD hibernation mechanism to prevent HDDs from entering hibernation when a volume is degraded, crashed, or not created.

11. Adjusted the default range of passive FTP/FTPS ports to align with maximum concurrent connections of each model.

12. Fixed multiple security vulnerabilities regarding Linux kernel (CVE-2018-1000199, CVE-2018-8897, CVE-2017-0861).

13. Fixed a security vulnerability regarding OpenSSL (CVE-2018-0739).

14. Fixed a security vulnerability regarding procps-ng (CVE-2018-1124).

15. Fixed a security vulnerability regarding ISC DHCP (CVE-2017-3144).

16. Fixed multiple security vulnerabilities (Synology-SA-18:51).

17. Minor bug fixes.

Version: 6.2-23739 Update 2

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Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

2. This update will restart your Synology NAS if you are using the models listed below.

   • XS Series : RS2818RP+, RS3618xs, RS2418RP+, RS2418+, FS1018, DS3018xs, RS818RP+, RS818+, FS3017, FS2017, RS4017xs+, RS3617xs, RS3617RPxs, DS3617xs, RS3617xs+, RS18017xs+, RS2416RP+, RS2416+, RS18016xs+, DS3615xs, RC18015xs+, RS815RP+, RS815+, RS3614xs, RS3614RPxs, RS3614xs+, RS3413xs+, RS10613xs+, DS3612xs, RS3412xs, RS3412RPxs, DS3611xs, RS3411xs, RS3411RPxs

   • Plus Series : DS1618+, DS918+, DS718+, DS218+, DS1817+, DS1517+, DS2415+, DS1815+, DS1515+, DS415+

   • Value Series : DS418play

   • Others : VirtualDSM, DDSM

Fixed Issues

1. Adjusted power saving mechanism to improve PCIe compatibility.
2. Fixed multiple security vulnerabilities regarding Linux kernel (Synology-SA-18:01).
3. Fixed an issue where iSCSI Manager might not open for the incompatible format of iSCSI LUN configuration files set up before DSM 5.2.
4. Enhanced package start-up performance.
5. Fixed a security vulnerability (Synology-SA-18:36).

Version: 6.2-23739 Update 1

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Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed a security vulnerability regarding Linux kernel (CVE-2018-8897).
2. Enhance the performance of Surveillance Station when deleting recordings in btrfs volume.
3. Fixed multiple security vulnerabilities (Synology-SA-18:33).
4. Fixed an issue where VAAI might fail after iSCSI LUN was recovered by LUN Backup.
5. Fixed an issue where LUN configuration might be inconsistent.
6. Minor bug fixes.

Version: 6.2-23739

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Important Note

1. The update is expected to be available for all regions within the next few weeks, although the time of release in each region may vary slightly.

Compatibility and Installation

1. DSM 6.2 can only be installed on Synology products running DSM 6.0 and above.

2. Starting from DSM 6.2, the core replication function is centrally managed by a new package, Replication Service. Packages with replication feature, such as Snapshot Replication, must install the Replication Service package.

3. For the following models, DSM 6.2 will be the last upgradable version. DSM 6.2 will continue to receive critical and security updates until June 2023 after the official release. Please refer to the DiskStation Manager Life Cycle section in Synology Security White Paper.

   • XS Series : RS3412xs, RS3412RPxs, RS3411xs, RS3411RPxs, DS3612xs, DS3611xs

   • Plus Series : RS2212+, RS2212RP+, RS2211+, RS2211RP+, RS812+, RS812RP+, DS2411+, DS1812+, DS1512+, DS1511+, DS712+, DS412+, DS411+II, DS411+, DS213+, DS212+, DS211+, DS112+

   • Value Series : RS812, RS212, RS411, DS413, DS411, DS213, DS212, DS211, DS112, DS111

   • J Series : DS413j, DS411j, DS411slim, DS213air, DS212j, DS211j, DS112j

   • Others : DDSM

What’s New in DSM 6.2

1. DSM

   • For easier management, Key Manager can now be stored locally on Synology NAS. Encrypted shared folders can be auto-mounted without the need of a USB drive. (To achieve better data protection, users are suggested to store Key Manager on an external USB drive.)
   • Standard users can now right-click on shared folders in File Station to view Properties.
   • Added support for IBM WebSphere SSO.
   • Enhanced password strength policy for better account security.
   • Added support for a new SMS provider SendinBlue and Clickatell API (RESTful).
   • Added support for Thai language.
   • Updated Privacy Statement and related settings in the installation flow.

2. iSCSI Manager

   • Brand new iSCSI Manager built for IT administrators, providing a new management user interface for an optimized iSCSI management and monitoring experience.
   • Advanced LUN provides lightning-fast LUN snapshot creation and recovery, and LUN cloning within seconds, as well as VAAI/ODX, storage acceleration commands, and support for better VM performance. Since Advanced LUNs can utilize file system cache to provide better efficiency, block-level LUNs will no longer be supported on DSM 6.2 and onward. DSM 6.2 will still be compatible with the block-level LUNs upgraded from DSM 6.1 and prior.
   • Supports cross-volume LUN clones.
   • Added support for network binding settings to allow each iSCSI target to map to a network interface.
   • Users can now disable storage reclamation for thin-provisioned LUNs to enhance I/O performance.

3. Storage Manager

   • The brand new Overview shows the health status of all storage components on your NAS, displaying a clearer and better look on the system overview.

   • Introduced Storage Pool, a new storage component, to replace the original Disk Group and RAID Group, and rearrange storage-related functions to provide users with a more consistent and smoother experience.

   • Smart Data Scrubbing detects the supported file system and RAID type to perform data scrubbing automatically while enhancing data scrubbing usability. A new built-in scheduler allows users to do data scrubbing periodically with just a few clicks, improving data integrity and consistency.

   • RAID resync speed can now be adjusted to accommodate IT management needs.

   • Users can remotely deactivate drives via Storage Manager for better management.

   • Added a default monthly S.M.A.R.T. test on both new and existing drives that were not previously configured.

   • After each DSM upgrade, DSM will remind users if a bad sector or lifespan alert is not set up. 

   • The health status of disks is now uniform with storage pools and volumes.

   • Log Center now includes disk logs.

   • Provided an option to change stripe cache size when the RAID type of Storage pool is RAID 5, RAID 6, RAID F1, or SHR (three disks or above).

4. High Availability Manager 2.0

   • High Availability Manager has been modularized into a package to ensure better system maintenance and offers greater update  flexibility.

   • New mechanism can now eliminate unnecessary system reboot during major update to keep your cluster secure and maintain high service availability.

   • SHA 2.0 can handle situations more effectively especially when the servers are in a vulnerable state.

   • A simpler yet more intuitive user interface,  offering you a comprehensive cluster overview and management.

   • The new interface design provides more detailed and visual information as well as easy-to-follow solutions.

   • Brand new user interface is introduced to display more details of both active server and passive server, giving you an in-depth system utilization overview. 

   • When first creating SHA cluster, user new to SHA can choose to only replicate system configuration to shorten setup time.

5. Extended Btrfs File System Coverage

   • Btrfs file system is now available on more Synology NAS models utilizing ARM platforms. Enjoy the powerful features of the next-generation file system.

   • Applied Models:

     • 18-series: DS218, DS418 and more x18 series to come. 

6. Azure AD support

   • Added the capability to join existing Azure AD as an SSO client. Utilizing the single sign-on feature, daily productivity is increased by saving time spent on re-authentication.

7. Security Advisor

   • User login details and abnormal geolocation information are dissected using intelligent analysis techniques and reported via DSM notifications. 

   • Daily and monthly reports provide more comprehensive information, allowing IT administrator to review abnormal activity and security scan regularly.

8. TLS/SSL Profile Level

   • An advanced way to configure your security level profile based on different services to meet different security level requirements, providing flexibility to suit your network security requirements.

9. 2-step authentication

   • Synology NAS administrators must set up an email notification when 2-step authentication is enabled.

10. Domain/LDAP management

    • Flexibly assign specified domain groups with admin privileges.

11. FTP

    • Added ECDSA certificate support for FTPS connections.

12. NFS

    • Added NFS v4.1 multipathing for load balancing and network redundancy to fully support VMware vSphere® 6.5.

    • Applied models:

      • 18-series : DS3018xs, DS418play, DS918+, DS418j, DS418, DS718+, DS218+
      • 17-series : FS3017, FS2017, RS4017xs+, RS3617xs, RS3617RPxs, DS3617xs, RS3617xs+, RS18017xs+, DS1817+, DS1817, DS1517+, DS1517, RS217
      • 16-series : RS2416RP+, RS2416+, RS18016xs+, DS416play, RS816, DS916+, DS416slim, DS416j, DS416, DS216play, DS716+II, DS716+, DS216j, DS216+II, DS216+, DS216, DS116

13. Package Center

    • The brand new user interface design brings a more intuitive experience and allows users to quickly find everything they need.

14. IHM tool

    • Added Seagate IronWolf Health Management (IHM) support on DS118, DS218play, DS418j and DS418.

Known Issues & Limitations

1. DSM 6.2 is the last DSM version supporting IPv6 Tunneling in Network Interface.

2. The Fedora utility will not be supported after DSM 6.2.

3. Starting from DSM 6.2, the USB device drivers, including printers, cloud printers, DAC/speakers, Wi-Fi dongles, DTV dongles, LTE dongles, and Bluetooth dongles will no longer be updated.

4. Wi-Fi dongle does not support Parental Control and Device List if set as Bridge Mode.

5. Starting from DSM 6.2 Beta, Virtual Machine Manager will no longer support creating clusters with older DSM versions. Please update each host in the cluster to the same DSM version or above versions for the Virtual Machine Manager cluster to operate properly.

6. SSH authentication by DSA public key is prohibited for security concerns.

7. When logging in through VPN or Proxy server, some functionalities may have authentication issues. To fix this issue, please go to Control Panel > Security, and click the Trusted Proxies button to add the trusted proxy server to the list.

8. The original RAID scrubbing scheduled tasks will be migrated to Smart Data Scrubbing scheduled tasks. If the upgrade is performed while running scheduled tasks, the Data Scrubbing process will automatically be re-executed shortly after the upgrade is completed. 

9. Office 2.x and below are not compatible with DSM 6.2. 

Version: 6.1.7-15284 Update 3

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed a security vulnerability regarding Netatalk (Synology-SA-18:62).
2. Fixed a security vulnerability (Synology-SA-18:64).

Version: 6.1.7-15284 Update 2

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

2. This update will restart your Synology NAS if you are using the models listed below.

   • XS Series : RS2818RP+, RS3618xs, RS2418RP+, RS2418+, FS1018, DS3018xs, RS818RP+, RS818+, FS3017, FS2017, RS4017xs+, RS3617xs, RS3617RPxs, DS3617xs, RS3617xs+, RS18017xs+, RS2416RP+, RS2416+, RS18016xs+, DS3615xs, RC18015xs+, RS815RP+, RS815+, RS3614xs, RS3614RPxs, RS3614xs+, RS3413xs+, RS10613xs+, DS3612xs, RS3412xs, RS3412RPxs, DS3611xs, RS3411xs, RS3411RPxs

   • Plus Series : DS1618+, DS918+, DS718+, DS218+, DS1817+, DS1517+, DS2415+, DS1815+, DS1515+, DS415+

   • Value Series : DS418play

   • Others : VirtualDSM, DDSM

Fixed Issues

1. Adjusted power saving mechanism to improve PCIe compatibility.
2. Fixed a security vulnerability (Synology-SA-18:36).

Version: 6.1.7-15284 Update 1

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed a security vulnerability regarding Linux kernel (CVE-2018-8897).
2. Fixed multiple security vulnerabilities (Synology-SA-18:33).
3. Fixed a security vulnerability regarding Procps-ng (CVE-2018-1124).
4. Minor bug fixes.

Version: 6.1.7-15284

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. Updated Privacy Statement

Fixed Issues

1. Improve stability of Docker when using Btrfs under low memory configurations.
2. Improved stability of the snapshot replication feature.
3. Enhanced stability of MCS in Windows environments.
4. Fixed an issue where a file’s Last Opened Date may be incorrect when using Spotlight.
5. Fixed an issue where enabling SSD Trim may cause file services failure in a high-availability cluster.
6. Fixed an issue fan where changes to speed settings do not apply immediately in a high-availability cluster.
7. Fixed a security vulnerability regarding Wget (CVE-2018-0494).
8. Fixed a security vulnerability regarding PostgreSQL (CVE-2018-1058).
9. Fixed a security vulnerability regarding Linux kernel (Synology-SA-18:21, CVE-2018-1000199).

Version: 6.1.6-15266 Update 1

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

Fixed Issues

1. Fixed an issue where Drive might not work properly when the indexing rules have been changed.
2. Fixed an issue where certain functions in Package Center might not work properly on Synology NVR products.

Version: 6.1.6-15266

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed an issue where iSCSI service may stop under Windows cluster environment.
2. Fixed an issue where the history record of Resource Monitor may not be updated.
3. Fixed an issue where Korean files may not be read by HFS+.
4. Fixed a security vulnerability regarding p7zip (CVE-2017-17969).
5. Fixed multiple security vulnerabilities regarding NTP (Synology-SA-18:13).
6. Fixed multiple security vulnerabilities regarding Linux kernel (CVE-2017-15649, CVE-2017-17712).
7. Fixed a security vulnerability regarding isc-dhcp (CVE-2018-5732).
8. Fixed multiple security vulnerabilities regarding Samba (Synology-SA-18:08).
9. Fixed multiple vulnerabilities (Synology-SA-18:14).

Version: 6.1.5-15254 Update 1

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

Fixed Issues

1. Enhanced system stability.

Version: 6.1.5-15254

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

What's New in DSM 6.1.5

1. Added support for editing permissions to multiple groups and users to a single folder or file simultaneously in File Station.
2. Added Seagate IronWolf Health Management (IHM) support on DS118, DS218play, DS418j, DS418 and DS218.

Fixed Issues

1. Fixed an issue where the system may make a false alarm about hot spare disks when upgrading SHA.
2. Fixed a domain issue by allowing Synology NAS to join an existing domain with an ASCII password.
3. Enhanced system efficiency in calculating a large number of user and group privilege settings.
4. Enhanced SSD cache reliability.
5. Fixed the issue where setting notifications for low volume capacity is not available on 1-bay models.
6. Fixed an issue where converting a single volume to support multiple volumes may be misidentified as a crashed volume.
7. Fixed an issue where users may not be able to collapse and expand fieldsets on an SSD cache webpage with Safari 11 browser.
8. Fixed a security vulnerability regarding Linux kernel (CVE-2017-16939).
9. Fixed a security vulnerability regarding Samba (Synology-SA-17:72).

Version: 6.1.4-15217 Update 5

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed an issue where the scan results of Security Advisor may not be correct.

Version: 6.1.4-15217 Update 4

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed an issue where Block LUNs cannot be enabled after upgrading to DSM 6.1.4-15217-3.
2. Fixed an issue where Advanced LUNs larger than 2TB cannot be mapped to Targets after upgrading to DSM 6.1.4-15217-3.

Version: 6.1.4-15217 Update 3

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. This update is a repack to fix the iSCSI issues.

(2017-12-13)
Fixed Issues

1. Fixed multiple security vulnerabilities pertaining to OpenSSL (CVE-2017-3735, CVE-2017-3736, CVE-2017-3737, CVE-2017-3738).
2. Enhanced the stability of the Apollo Lake platform BIOS.
3. Fixed an issue with abnormal transfer rates for LUNs when backing up to an external storage device.
4. Fixed an issue where DSM may shutdown incorrectly when iSCSI Block LUN services are overloaded.
5. Improved the error handling mechanism for the SSD cache when volumes crash.
6. Enhanced the stability of the upgrade process for SHA clusters.
7. Enhanced volume expansion process stability after an improper shutdown.
8. Enhanced system efficiency for calculating large numbers of user and group privilege settings.
9. Fixed an issue where Microsoft Office documents may fail to save when Windows 10 Fall Creators Update is installed.

Version: 6.1.4-15217 Update 2

---

1. Fixed multiple security vulnerabilities regarding Samba (Synology-SA-17:72 Samba).

Version: 6.1.4-15217 Update 1

---

1. Fixed an issue where PPPoE cannot be displayed properly in Control Panel.

Version: 6.1.4-15217

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

What's New in DSM 6.1.4

1. Adjusted the threshold of remaining storage capacity warning to 10%.
2. Support 12TB IronWolf and IronWolf Pro drives with IHM.
3. Users with ACL permissions set as "administration" can edit shared folders in File Station.

Fixed Issues

1. Enhanced the compatibility of USB on certain models.
2. Enhanced the compatibility of SAS drives on certain models.
3. Fixed an issue where the response of user interface might slow down when using hotspares under certain circumstances.
4. Fixed user interface display issues to enhance the usability of Resource Monitor.
5. Fixed an issue where DSM mobile might not work properly on devices running Android 8.0.
6. Fixed an issue where administrator might not be able to log in DSM after removing clients from trusted client list.
7. Enhanced file system stability by backporting Kernel updates.
8. Enhanced the stability of RAID 5, RAID 6, RAID F1, and SHR.
9. Enhanced the compatibility of Windows AD and NFS protocol.
10. Fixed an issue where RAID Resync might slow down when creating or deleting multiple volumes.
11. Fixed an issue where users might be logged out or shared folders of mounted via AFP might be disconnected when changing permissions.
12. Fixed an issue where the background of login panel might be blurry when accessing DSM on Chrome browser.
13. Fixed an issue where users might not be able to collapse and expand nested sections on DSM webpage when using Safari 11 browser.
14. Fixed search results filters of File Station, AFP and SMB to ensure that users can only find files with read permissions in their search results.
15. Fixed multiple security vulnerabilities regarding Linux kernel (CVE-2017-10661, CVE-2017-10662, CVE-2017-10663).
16. Fixed a security vulnerability regarding Samba (CVE-2017-11103).
17. Fixed multiple security vulnerabilities regarding Wget (CVE-2017-6508, CVE-2017-13089, CVE-2017-13090).
18. Fixed a security vulnerability regarding XSS (CWE-79).
19. Fixed multiple security vulnerabilities regarding poppler library (CVE-2017-2820, CVE-2017-7511, CVE-2017-7515, CVE-2017-9408, CVE-2017-9775).
20. Fixed multiple security vulnerabilities regarding Samba (Synology-SA-17:57).

Version: 6.1.3-15152 Update 8

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed multiple security vulnerabilities regarding WPA/WPA2 protocols for wireless connections (CVE-2017-13077, CVE-2017-13078, CVE-2017-13079, CVE-2017-13080, CVE-2017-13081, CVE-2017-13082, CVE-2017-13084, CVE-2017-13086, CVE-2017-13087, CVE-2017-13088).

Version: 6.1.3-15152 Update 7

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Enhanced system stability on certain models:
   • DS918+
   • DS718+
   • DS218+
   • DS418play
2. Enhanced the stability when adding hard disks to expand RAID.

Version: 6.1.3-15152 Update 6

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed multiple security vulnerabilities regarding DNSmasq (CVE-2017-13704, CVE-2017-14491, CVE-2017-14495, CVE-2017-14496).
2. Fixed multiple security vulnerabilities regarding DHCPv6 Server (CVE-2017-14492, CVE-2017-14493, CVE-2017-14494).

Version: 6.1.3-15152 Update 5

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Enhanced monitor mechanism of drive temperatures.
2. Enhanced compatibility of certain drives.
3. Improved the healing mechanism for possible cache device errors.
4. Enhanced file system stability by backporting Kernel updates.
5. Fixed an issue where DSM might not check updates properly when QuickConnect is enabled.
6. Enhanced the stability of DSM startup.
7. Fixed a security vulnerability regarding Bluetooth dongle (CVE-2017-1000250).
8. Fixed a security vulnerability regarding Linux kernel (CVE-2017-1000251).

Version: 6.1.3-15152 Update 4

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed HDD hibernation issues to enhance HDD compatibility.
2. Enhanced overall stability of iSCSI services.
3. Fixed compatibility issues with VMware environments.
4. Fixed multiple security vulnerabilities regarding Linux Kernel (CVE-2017-10661, CVE-2017-10662, CVE-2017-10663).
5. Enhanced the stability of RAID 5, RAID 6, SHR and RAID F1.

Version: 6.1.3-15152 Update 3

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed a compatibility issue when using USB passthrough in Virtual Machine Manager.
2. Fixed security vulnerabilities regarding Linux kernel (CVE-2017-7533, CVE-2017-8890, CVE-2017-1000364, CVE-2017-1000365, CVE-2017-1000370, CVE-2017-1000371).
3. Enhanced the stability of iSCSI Block-Level LUNs.

Version: 6.1.3-15152 Update 1

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

Fixed Issues

1. Fixed a security vulnerability regarding Samba (CVE-2017-11103).

Version: 6.1.3-15152

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed an issue where some packages might not be repaired automatically.
2. Fixed an issue where the creation of SSD cache might fail on DS1817.
3. Fixed multiple issues regarding quota configuration for users in the administrators group.
4. Fixed an issue where the trusted domain might not display after the deletion and refresh of domain list.
5. Fixed an issue where a connection timeout might occur upon the access to file service page without any available external IP addresses.
6. Fixed an issue where DSM might fail to establish the network connection after reboot.
7. Fixed a security vulnerability regarding FFmpeg (CVE-2017-9993).
8. Fixed a security vulnerability regarding DSM login page (CVE-2017-9553, CVE-2017-9554).
9. Fixed a security vulnerability regarding Nginx (CVE-2017-7529).

Version: 6.1.2-15132 Update 1

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

Fixed Issues

1. Fixed an issue where the trusted domain might not display after the deletion and refresh of domain list.
2. Fixed a security vulnerability regarding FFmpeg (CVE-2017-9993).

Version: 6.1.2-15132

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

2. This update will restart your Synology NAS.

What's New in DSM 6.1.2

1. Enhanced the write performance of encrypted shared folders when using the AFP.
2. Added support for DHCP server lease time to be measured in seconds.

Fixed Issues

1. Upgraded Samba to version 4.4.13, and fixed a security vulnerability (CVE-2017-2619).
2. Fixed an issue where some users might experience failure when updating domain data, and enhanced the speed of domain data updates.
3. Fixed an issue where users might experience failure when joining a domain.
4. Fixed an issue where volume creation might fail on some models.
5. Fixed an issue where SSD cache status might not be correctly reported via the SNMP.
6. Fixed an issue where SSD read-write cache might fail to be loaded when upgraded to a larger cache in RAID 1.
7. Enhanced the resource usage rate of passive servers on SHA clusters.
8. Enhanced the stability of the unmounting process for encrypted shared folders.
9. Fixed an issue where the L2TP connection service might not work properly for IPv6 clients.
10. Fixed an issue where MTUs might be incorrect after Bond is established on DSM.
11. Fixed an issue where the IPv6 service might not work properly.
12. Fixed an issue where gateway information might be lost when Bond is removed.
13. Refined the IronWolf Health Management (IHM) thresholds.
14. Fixed issue where some 4TB IronWolf drives were not detected when IronWolf Health Management (IHM ) was enabled.
15. Modified description of drive health status.
16. Fixed an issue where 32-bit models might not be properly repaired or expanded due to volume limits.

Version: 6.1.1-15101 Update 4

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

Fixed Issues

1. Fixed a security vulnerability regarding samba service (CVE-2017-7494).

Version: 6.1.1-15101 Update 3

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed a security vulnerability regarding Linux kernel (CVE-2017-7308).
2. Enhanced the stability of DSM when establishing a network connection.
3. Fixed an issue where DNS server might fail to add IPv6 subnet.

Version: 6.1.1-15101 Update 2

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed a security vulnerability (CVE-2017-7184).
2. Fixed an Ubuntu virtual machine system freeze issue on Virtual Machine Manager.
3. Enhanced the stability of iSCSI service.

Version: 6.1.1-15101 Update 1

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart Synology NAS models supporting SSD cache.

Fixed Issues

1. Fixed an issue where domain users/groups might be displayed incorrectly when a file ACL is checked via Samba.
2. Fixed an issue where users might experience failure or receive no response when updating domain data.
3. Fixed an issue where volumes might not function normally when read-write SSD cache is used with advanced iSCSI LUNs.
4. Fixed an issue where encrypted shared folders cannot be unmounted when connections with Samba clients have been established.
5. Fixed an issue where failure of installation or upgrade might occur in Package Center.

Version: 6.1.1-15101

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

What's New in DSM 6.1.1

1. This update includes all bug fixes as well as security fixes in the previously released updates since DSM 6.1.
2. Added support for scheduled RAID scrubbing.
3. Upgraded Samba to version 4.4.9.

Fixed Issues

1. Fixed an issue where the OTP might be requested repeatedly when users log in a same trusted device with different accounts.
2. Fixed an issue where File Station might not work properly when playing slideshows of photos without thumbnails if opened via Application Portal.
3. Fixed an issue where proxy settings cannot be changed when Let's Encrypt is in use.
4. Fixed an issue where packages cannot be repurchased after refunds.
5. Fixed an issue where Auto Block might fail to block addresses when the Allow List is set as an IP range.
6. Fixed an issue where the default gateway might not be updated when a DHCP client has not received DNS information.
7. Fixed an issue where firewall rules might not be displayed correctly when users add or remove rules on the same port.
8. Fixed an issue where UPnP rules might fail to work properly on Synology NAS with a single Ethernet port.
9. Fixed an issue where the DSM user interface might fail to be properly displayed when DHCP Server receives invalid DNS addresses.
10. Fixed an issue where L2TP connections might fail to be established in kernel 4.4 when the kernel mode is enabled.
11. Fixed an issue where an L2TP connection might fail to be established when the server address starts with a number.
12. Enhanced the usability and display correctness of the Wake on Lan user interface.
13. Fixed an issue where Synology NAS cannot be properly shut down when a bond has been established between Mellanox ConnectX-3 and Synology E10G17-F2.
14. Fixed an issue where DSM might show the message of volume crash upon reboot when a single-disk SHR volume has been mounted with cache and transformed into a Disk Group.
15. Fixed an incorrect volume display on some models where RAID Groups are supported and SHR has been enabled.
16. Fixed an issue where SHA cannot be created when FS3017 contains over 12 drives.
17. Fixed an issue where the settings of SMB encrypted transmission cannot be properly configured.
18. Fixed a connection error that might occur when the name of an SMB shared folder contains consecutive spaces.
19. Fixed an issue where Key Manager might fail to mount encrypted shared folders automatically on startup.
20. Enhanced the stability of the iSCSI service.
21. Fixed an issue where files cannot be written into encrypted shared folders on ext3 file system.
22. Fixed an issue where Snapshot Replication might fail when compression is enabled for shared folders.
23. Fixed an issue where DSM cannot be shut down properly on Qoriq or 88f6281/88f6282 platforms when JBOD volumes are in use.
24. Enhanced the stability of the upgrade process of SHA clusters.

Version: 6.1.1-15095

---

1. Supported new models DS1817+ & DS1517+.

Version: 6.1-15047 Update 2

---

Fixed Issues

1. Fixed an issue where a high-availability cluster might unexpectedly switch over when the active server is busy.
2. Fixed an issue where SHA alternatively displays the message of availability/unavailability due to false alarm.
3. Fixed an issue where DSM cannot be joined into Windows AD domains after upgrading to version 6.1.
4. Fixed an issue where domain users cannot be edited on DSM after enabling Windows AD services.
5. Fixed an issue where LDAP users could fail to access files via the SMB protocol.
6. Fixed the compatibility issue of VMware with some file LUNs created on DSM 6.0 Beta.
7. Fixed an issue where an encrypted shared folder cannot be decrypted when the encryption key is set to maximum length.
8. Enhanced the stability of the iSCSI service.
9. Fixed an issue where Auto Block might fail to block addresses when the Allow List is set as an IP range.
10. Fixed an incorrect volume display on some models where RAID Groups are supported and SHR has been enabled.
11. Fixed an issue where Microsoft Office and Adobe documents cannot be opened on Windows after being accessed on macOS via the AFP protocol.
12. Improved the write performance of fragmented Btrfs volumes.
13. Added Seagate IronWolf Health Management (IHM) support on Broadwell-DE models.
14. Fixed the compatibility issue of WD WD8001FFWX with the DX1215 expansion unit.

Version: 6.1-15047 Update 1

---

1. Fixed a security vulnerability with the Auto Block function that could allow remote attackers to bypass the current IP blocking mechanism.

Version: 6.1-15047

---

Compatibility and Installation

1. DSM 6.1 can only be installed on Synology products running DSM 6.0. Before starting, please log in to DSM and go to Control Panel > Update & Restore to install the latest DSM.
2. Time Backup and HiDrive Backup will not be supported in DSM 6.1 and above.
3. We can not guarantee the accuracy or completeness of third party packages, which are not developed by Synology.
4. Manual re-indexing is required for all files after upgrading to DSM 6.1. The file indexing service in Control Panel has been moved to the preference settings in Synology Universal Search.
5. Due to infrastructure update, packages will need re-initialization after upgrading to DSM 6.1. The process will occupy a higher CPU usage and can take up to an hour depending on the number of packages installed.
6. Directory Server package must be disabled (stop) in Package Center before the upgrade if the server is running on a High Availability cluster.
7. The DSM Help articles in the following languages have been removed: Brazilian Portuguese, European Portuguese, Norwegian, Turkish, Hungarian, Swedish, Danish. In all the packages, the Help articles in these six languages will also be removed.

What’s New in DSM 6.1 Official

1. Extended Btrfs File System Coverage

   • Btrfs file system is now available on more Synology NAS models. Enjoy the powerful features of the next-generation file system.
   • Applied models:
     • 17-series: RS3617xs+, RS3617xs, RS3617RPxs, DS3617xs
     • 16-series: RS18016xs+, RS2416+, RS2416RP+, DS916+, DS416play, DS716+II, DS716+, DS216+II, DS216+
     • 15-series: RC18015xs+, DS3615xs, DS2415+, DS1815+, DS1515+, RS815+, RS815RP+, DS415+
     • 14-series: RS3614xs+, RS3614xs, RS3614RPxs, RS814RP+, RS814+, RS2414RP+, RS2414+
     • 13-series: RS10613xs+, RS3413xs+, DS1813+, DS1513+, DS713+, DS2413+
     • 12-series: DS3612xs, RS3412xs, RS3412RPxs, RS2212+, RS2212RP+, DS1812+, DS1512+, RS812+, RS812RP+, DS412+
     • 11-series: DS3611xs, RS3411xs, RS3411RPxs,

2. File Self-Healing

   • DSM is now capable of detecting and repairing silent data corruption if your Synology NAS meets the following criteria:
     • Running Btrfs file system
     • Built on RAID 1, RAID 5, RAID 6, RAID 10, RAID F1 or non-1 disk SHR

3. Shared Folder Encryption

   • In addition to encrypting a shared folder as you create it, you can now encrypt an existing shared folder, including the "homes" folder, after its creation.
   • With Key Manager, you can now use a USB storage device as a physical key to mount encrypted shared folders automatically without having to memorize all the encryption keys.
   • Removed the "Mount automatically on startup" function from the edit page of shared folders.

4. Account Protection

   • More effective way to guard against brute-force attack
   • Users can set up the number of failed login attempts from trusted or untrusted devices within the specified time period.

5. Extended RAID F1 Support

   • RAID F1 is now available on more Synology NAS models to take advantage of the new RAID type designed for all flash.
   • Applied models:
     • 17-series: FS3017, RS3617xs+, RS3617xs, RS3617RPxs, DS3617xs
     • 16-series: RS18016xs+
     • 15-series: RC18015xs+, DS3615xs
     • 14-series: RS3614xs+, RS3614xs, RS3614RPxs
     • 13-series: RS10613xs+, RS3413xs+

6. File Services

   • Windows File Services and Mac File Services have been renamed SMB and AFP, respectively.
   • All SMB services (SMB1/2/3) are now running Samba 4.4.
   • Supports Time Machine via SMB3 in Mac OS 10.12 and above.
   • Supports Bonjour service, allowing you to back up data to multiple shared folders via Time Machine.
   • Supports sparse files over the SMB protocol to enhance usage efficiency of file system space and network bandwidth.
   • You can now restore to a previous version from Windows Explorer when mounting your home folder via the SMB protocol.
   • After enabling files fast clone in File Service advanced settings, files can be copied at a faster speed when the source and destination are within the same Btrfs volume.

7. Storage Manager

   • RAID type can now be changed from SHR-1 to SHR-2, providing greater flexibility of storage expansion and better data protection. Note: Depending on your disk configuration, two additional disks may be required when changing your RAID type from SHR-1 to SHR-2. For more information, please refer to DSM Help.
   • Provides more types of disk health status to help you grasp the health info of your disks.
   • You can now migrate a single volume to a disk group and then create multiple volumes while using SHR (more flexible for models built on the 32-bit architecture with a single volume size limit of 16TB) .

8. Resource Monitor

   • IT administrators will receive notifications regarding performance issues of the CPU, memory, disks, or LUNs (available on XS+ and XS models).
   • I/O throughput of each process can now be monitored in Task Manager (available on models with Intel 64-bit processors).
   • Added the service-based view, allowing you to monitor resource usage of each service and application (available on models with Intel 64-bit processors).

9. Service Modularization

   • Some of DSM’s built­-in features have been modularized into packages to ensure better system maintenance and update flexibility.
   • Modularization in DSM 6.1 includes USB Copy, File Station, and File indexing.

10. Package Center

    • Automatically updates incompatible packages after the installation of DSM 6.1 to boost your upgrading experience.

11. Flexible Update Options

    • You can apply important fixes without unnecessary system reboots.
    • In case a reboot is required to complete an update, the system will notify you via Email and in DSM, allowing you the flexibility to reboot at a time of your choice.

Known Issues & Limitations

1. Ended support for Intrusion Prevention since DSM 6.1. This package will be removed from Package Center.

Version: 6.1-15022 Update 1

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

Fixed Issues

1. Fixed an issue where file attributes (e.g. Hidden/Read-only) may not work properly when accessed via SMB after Active Directory Server is activated.

Note: After installing this update, file attributes will be restored to the last ones before Active Directory Server is activated.

Version: 6.0.3-8754 Update 8

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed multiple security vulnerabilities (Synology-SA-18:33).

Version: 6.0.3-8754 Update 7

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. Updated Privacy Statement

Fixed Issues

1. Fixed a security vulnerability regarding Wget (CVE-2018-0494).

Version: 6.0.3-8754 Update 6

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed multiple security vulnerabilities regarding Linux Kernel (CVE-2017-1000253, CVE-2017-1000364, CVE-2017-1000365, CVE-2017-1000370, CVE-2017-1000371).
2. Fixed multiple security vulnerabilities regarding Bluetooth (CVE-2017-1000250, CVE-2017-1000251).
3. Fixed multiple security vulnerabilities regarding WPA/WPA2 protocols for wireless connections (CVE-2017-13077, CVE-2017-13078, CVE-2017-13079, CVE-2017-13080, CVE-2017-13081, CVE-2017-13082, CVE-2017-13084, CVE-2017-13086, CVE-2017-13087, CVE-2017-13088).
4. Fixed multiple security vulnerabilities regarding DNSmasq (CVE-2017-13704, CVE-2017-14491, CVE-2017-14495, CVE-2017-14496).
5. Fixed multiple security vulnerabilities regarding DHCPv6 Server (CVE-2017-14492, CVE-2017-14493, CVE-2017-14494).

Version: 6.0.3-8754 Update 5

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Enhanced the stability of RAID 5, RAID 6, and RAID F1.
2. Enhanced file system stability by backporting Kernel updates.

Version: 6.0.3-8754 Update 4

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed a security vulnerability regarding Nginx (CVE-2017-7529).
2. Fixed a security vulnerability regarding Samba (CVE-2017-11103).
3. Fixed a security vulnerability regarding DSM login page (CVE-2017-9553).

Version: 6.0.3-8754 Update 3

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

Fixed Issues

1. Fixed a security vulnerability regarding FFmpeg (CVE-2017-9993).

Version: 6.0.3-8754 Update 2

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Enhanced the stability of iSCSI service.
2. Enhanced compatibility of XenServer for CHAP Discovery.

Version: 6.0.3-8754 Update 1

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

Fixed Issues

1. Fixed a security vulnerability regarding samba service (CVE-2017-7494).

Version: 6.0.3-8754

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

What's New in DSM 6.0.3

1. Supports scheduled RAID data scrubbing.

Fixed Issues

1. Improved the procedure for creating/deleting SSD cache.
2. Fixed an issue where the system might fail to enter the hibernation mode in the IPv6 environment.
3. Fixed an issue where login history might not display properly in Log Center.
4. Fixed an issue where Let’s Encrypt CA (Certificate Authority) could not be updated after setting up proxy.
5. Fixed an issue where gofile.me sharing links could not be accessed via Firefox.
6. Fixed an issue where deleted files might still be indexed from the Recycle Bin in a shared folder.
7. Fixed an issue where file indexing might be inaccurate after renaming a shared folder.
8. Fixed an issue where uploading files via Firefox 52.0 might fail.
9. Enhanced the stability of the iSCSI service.

Version: 6.0.2-8451 Update 11

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed several security vulnerabilities regarding Linux kernel (CVE-2016-10229).

Version: 6.0.2-8451 Update 10

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

Fixed Issues

1. Fixed an issue where the data in Office and Note Station might be deleted when Synology NAS is removed from LDAP/AD domains.

Version: 6.0.2-8451 Update 9

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Enhanced the stability of Btrfs file system after an abnormal shutdown.
2. Enhanced the stability of iSCSI service.
3. Enhanced system stability when connecting via the SMB protocol.
4. Enhanced the stability of Synology E10G15-F1.
5. Fixed a security vulnerability regarding PHPMailer (CVE-2017-5223). Upgrading Photo Station to version 6.6.3 or above is required.

Version: 6.0.2-8451 Update 8

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Enhanced SHA stability by optimizing CPU usage priority on the running process.
2. Enhanced the stability of a Btrfs volume with SSD cache.
3. IPv6 is now supported by ICMP rule in Firewall.
4. Fixed a security vulnerability regarding PHPMailer (CVE-2016-10033,CVE-2016-10045 )。
5. Fixed a security vulnerability regarding Linux Kernel (CVE-2016-7117).
6. Fixed an issue where VPN server might restart unexpectedly.

Version: 6.0.2-8451 Update 7

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Enhanced the stability of RAID 5.

Version: 6.0.2-8451 Update 6

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed an issue where under certain circumstances, new snapshots could not be taken.
2. Fixed an issue where DSM might fail to access the internet when IPv6 Gateway address is manually set.
3. Fixed a security vulnerability regarding Linux kernel: CVE-2016-8655.
4. Fixed a security vulnerability regarding ImageMagick: CVE-2016-8707

Version: 6.0.2-8451 Update 5

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

Fixed Issues

1. Enhanced Surveillance Station responsiveness on Btrfs file system.
2. Refined the mechanism for reporting abnormal system fan behavior to avoid false alarms.

3. Improved 4K sequential read IOPS on Advanced LUNs.

4. Optimized CPU usage of Resource Monitor.

5. Fixed several security vulnerabilities regarding NTP module (CVE-2016-7426, CVE-2016-7427, CVE-2016-7428, CVE-2016-7429, CVE-2016-7431, CVE-2016-7433, CVE-2016-7434, CVE-2016-9310, CVE-2016-9311, CVE-2016-9312).
6. Fixed an issue where CMS might cause excessive CPU usage.
7. Fixed an issue where file names in certain languages might not display correctly when searching for files on specific models (DS413 and DS213+) with Mac Finder via AFP.
8. Fixed an issue where the DNS service of IPv6 might reconnect frequently.

Version: 6.0.2-8451 Update 4

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

Fixed Issues

1. Fixed an issue where hot spare might not be properly activated.
2. Fixed an issue where false alarm might be triggered in Security Advisor.
3. Fixed an issue where the information of external storage devices and SSDs might be incorrectly displayed.

Version: 6.0.2-8451 Update 3

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

Fixed Issues

1. Enhanced performance of resolving group list for domain users belonging to large domain groups.
2. Enhanced stability during file-copy operation via NFS protocol.
3. Enhanced server responsiveness on Btrfs file system.
4. Upgraded cURL to 7.50.3 as a cumulative security update and fixed multiple security vulnerabilities. (CVE-2016-8615, CVE-2016-8616, CVE-2016-8617, CVE-2016-8618, CVE-2016-8619, CVE-2016-8620, CVE-2016-8621, CVE-2016-8622, CVE-2016-8623, CVE-2016-8624, CVE-2016-8625)
5. Fixed an issue where applications might fail to save files on macOS 10.12.x via AFP.
6. Fixed an issue where irrelevant data of MailPlus Server or Mail Server might have been collected in logs.
7. Fixed a security vulnerability regarding Linux kernel: CVE-2016-5195.
8. Fixed a issue where users may fail to launch Chat and Office in a Safari browser.

Version: 6.0.2-8451 Update 2

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

Fixed Issues

1. Fixed an issue where SHA may fail to set SNMP UPS.
2. Fixed an issue where Synology E10G15-F1 NIC may disconnect under certain circumstances.
3. Fixed an issue where Full File Clone via VMware VAAI could cause NFS protocol to act abnormally under certain circumstances.
4. Fixed an issue where the page at Control Pannel > Domain/LDAP does not respond.
5. Fixed an issue where Snapshot Replication could not open normally in certain timezones.
6. Fixed multiple security vulnerabilities regarding curl module (CVE-2016-5419, CVE-2016-5420, CVE-2016-5421).
7. Upgraded OpenSSL to 1.0.2j to address multiple vulnerabilities (CVE-2016-6304, CVE-2016-2183, CVE-2016-6303, CVE-2016-6302, CVE-2016-2182, CVE-2016-2180, CVE-2016-2177, CVE-2016-2178, CVE-2016-2179, CVE-2016-2181, CVE-2016-6306 and CVE-2016-7052).
8. Fixed an issue where system resources are not released properly after QuickConnect is enabled.
9. Fixed an issue where file indexing is not triggered when files are uploaded through Samba protocol.

Version: 6.0.2-8451 Update 1

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

Fixed Issues

1. Improved the stability of Btrfs file system when abnormal shutdown occurs under high system loads.
2. Fixed an issue where certain browsers and mobile apps might fail to connect to Synology NAS via HTTPS when HTTP/2 is enabled.
3. Fixed an issue where users might fail to log in after restoring system configurations from previous versions in the latest DSM 6.0.2.

Version: 6.0.2-8451

---

Important Note

1. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly. You can also manually download the patch file from Download Center.

What's New

1. This update includes all bug fixes as well as security fixes in the previously released updates since DSM 6.0.1.
2. You can now configure performance alarms on high-end models to notify system administrators when the resource utilization or performance metric meets the pre-defined criteria.
3. exFAT is now available on more models. Please refer to Add-on Packages Page for more details.
4. Supports setting up user permissions for DSM desktop.
5. Port 443 can now be used for setting up OpenVPN.
6. You can now customize the maximum concurrent HTTP connections on Intel-based models.

Fixed Issues

1. Improved the stability of system upgrade on SHA.
2. Optimized CPU usage on Btrfs file system.
3. Enhanced the performance of full content search.
4. PSD thumbnails are no longer supported in File Station due to performance concerns.
5. Fixed an issue where login identity might be incorrect in very rare cases.
6. Fixed a security vulnerability regarding XSS.
7. Fixed a security vulnerability regarding Nettle (CVE-2016-6489).
8. Minor bug fixes.

Known issues

1. After upgrading to DSM 6.0.2, the following options will be enabled by default in the Log Center package if you have set a storage destination for archives:

   • Archive local logs to the storage location
   • Send and Receive logs from other devices in BSD and IETF formats

Version: 6.0.1-7393 Update 2

---

1. Applied the workaround to mitigate a security vulnerability of libupnp module (CVE-2016-6255).

   Note: A manual reboot is required for systems using Wi-Fi dongles.

Version: 6.0.1-7393 Update 1

---

1. Improved system stability when Synology NAS serves as a VPN server.
2. Fixed several security vulnerabilities regarding NTP module (CVE-2016-4957, CVE-2016-4953, CVE-2016-4954, CVE-2016-4955, and CVE-2016-4956).
3. Fixed an issue where DSM user interface might become unresponsive under normal operation.
4. Fixed an issue where shared links created by LDAP users in DSM 5.2 might be unavailable after upgrading to DSM 6.0.
5. Fixed an issue where folders cannot be uploaded to File Station.
6. Fixed an issue where encrypted replication tasks cannot be resumed or completed when the sync process has been interrupted.
7. Fixed an issue where log files could not be rotated on the passive server in the HA cluster, which could cause the upgrade failure on the passive server.
8. Enhanced the process of shared folder encryption.

Version: 6.0.1-7393

---

What's New

1. This update includes all bug fixes as well as security fixes in the previously released updates since DSM 6.0-7321.
2. EDS14 can now be upgraded to DSM 6.0.1.
3. Improved overall performance for multiple client connections.
4. SSD TRIM is now supported on DS715, DS1515, and DS2015xs.
5. File Station
   • The sorting algorithm has been changed from sorting by name to natural sort order.
   • Changed the filter function to the search function to locate files efficiently.
   • Supports search history.
6. High Availability Manager
   • Added the quorum server settings to reduce split-brain error occurrences.
   • Proxy servers are supported.
   • Supports customized DSM ports and HTTPS connection.
   • Reduced by 60% the average time for detecting disconnected networks before automatic failover.
   • Improved HA cluster stability during upgrade.
   • Supports installing DSM on RC18015xs+ in network environments without a DHCP server.

Fixed Issues

1. Fixed an issue where an ext2 external storage device could not be mounted.
2. Fixed an issue where shared folders on NTFS external storage devices could not be remotely mounted to some models via NFS.
3. Reduced memory usage for writing data to an NTFS external storage device.
4. Fixed an issue where Microsoft Excel files in an encrypted shared folder on some models could not be correctly accessed via Windows File Service.
5. Fixed a security vulnerability regarding the p7zip module (CVE-2016-2335).
6. Fixed an issue where files might not appear in search results if their file types were not specified for file indexing.
7. Fixed an issue where backup tasks could not complete when the remote destination was encrypted.
8. Fixed an issue where IPv6 link-local authentication might fail for rsync.
9. Fixed an issue where backup tasks in Time Backup might not run after system upgrade.
10. Fixed an issue where system monitoring processes might demand system memory on RS10613xs+, RS18016xs+, and RC18015xs+.
11. Applied the workaround to mitigate a security vulnerability of ImageMagick module (CVE-2016-5118).
12. Minor bug fixes.

Version: 6.0-7321 Update 6

---

1. Applied the enhanced official workaround to mitigate multiple vulnerabilities of ImageMagick module (CVE-2016-3714, CVE-2016-3715, CVE-2016-3716, CVE-2016-3717, CVE-2016-3718).

Version: 6.0-7321 Update 5

---

1. Upgraded NTP to 4.2.8p7 to address multiple vulnerabilities (CVE-2016-1547, CVE-2016-1548, CVE-2016-1549, CVE-2016-1550, CVE-2016-1551, CVE-2016-2516, CVE-2016-2517, CVE-2016-2518, CVE-2016-2519).
2. Upgraded OpenSSL to 1.0.2h to address multiple vulnerabilities (CVE-2016-2105, CVE-2016-2106, CVE-2016-2107, CVE-2016-2108, CVE-2016-2109, CVE-2016-2176).
3. Enhanced the compatibility of Synology NAS with Hyper-V exports.
4. Fixed an issue where adding ACL permissions or changing file owner would fail in Windows via SMB.
5. Fixed an issue where iSCSI ACL could not access LUNs properly.
6. Fixed an issue where editing shared folders would fail when shared folder netlogn/sysvol existed.
7. Fixed an issue where channel scan could not be performed on entry Marvell models with certain DVB-T dongles.
8. Fixed an issue where LUNs could not be backed up to an external SATA device.
9. Fixed an issue where iSCSI service might cause a system crash in a VMware environment under heavy load.
10. Before the official patch is released, workaround is applied to mitigate multiple vulnerabilities of ImageMagick module (CVE-2016-3714, CVE-2016-3715, CVE-2016-3716, CVE-2016-3717, CVE-2016-3718).

Version: 6.0-7321 Update 3

---

1. Fixed multiple issues that might cause the iSCSI service to hang under heavy loading and performing VMware commands.
2. Fixed an issue where the file created time was not correctly set.
3. Fixed an issue where LUN backup tasks of Hyper Backup could not be completed due to insufficient disk space after upgrade to DSM 6.0.
4. Fixed multiple vulnerabilities regarding the Samba module (CVE-2016-2118, CVE-2015-5370, CVE-2016-2110, CVE-2016-2111, CVE-2016-2112, CVE-2016-2113, CVE-2016-2114, CVE-2016-2115).
5. Fixed an issue where changing the VLAN configurations might cause certain packages to operate abnormally.
6. Fixed an issue where configurations at Control Panel > Network > Network Interface could not be edited if IPv6 was configured before upgrade to DSM 6.0 from DSM 5.2.

Version: 6.0-7321 Update 2

---

1. Fixed an issue where DSM 6.0-7321 Update 1 could not be normally installed with Auto-Update.

   Note: This update does not require system reboot.

Version: 6.0-7321 Update 1

---

1. Improved the stability when connecting via AFP protocol.
2. Fixed a security vulnerability regarding Samba file service (CVE-2016-2118, also known as Badlock).
3. Fixed an issue where a false-alarm warning about unexpected file changes occurs when saving files in Office Excel 2003.
4. Fixed an issue where Docker DSM might be terminated even when valid licenses are imported.
5. Fixed multiple issues that might cause iSCSI service to hang under heavy loading and performing Vmware VAAI commands.
6. Fixed an issue in which the configuration change of VLAN could result in abnormal functionality of certain packages. e.g. Surveillance Station

7. Fixed an issue where the DSM welcome title and message will be reset to default if users set it to blank.

   Note: This update does not require system reboot.

Version: 6.0-7321

---

Compatibility and Installation

1. Some features have specific hardware requirements and are only available on certain Synology NAS products.
2. For security purposes, admin accounts with blank passwords will be disabled after the upgrade, and password change will be required.
3. Some third­-party packages may not be compatible with DSM 6.0; hence disabling the packages before upgrading to DSM 6.0 is necessary.
4. The current Alias settings in Application Portal will be disabled and require manual configuration after updating to DSM 6.0.
5. The DDNS of f3322.org is removed in DSM 6.0 official release due to unclarified domain usage violation. Please refer to http://www.pubyun.com/p/notice/ for details.
6. Due to the discontinued support by the open source team, the Asterisk package will no longer be supported after DSM 6.0.
7. If phpMyAdmin was upgraded during DSM 6.0 Beta 2, you need to uninstall it first so that its latest update will be available at Package Center.
8. The following packages will not be supported by NVR216 after upgrading to DSM 6.0:
   • PHP
   • Text Editor
   • Web Station
   • WebDAV
9. Internet Explorer 8 is no longer supported on DSM 6.0 and onward. Please refer to Software Spec for details

What’s New in DSM 6.0

1. Btrfs File System
   • Set usage/user quota for shared folders.
   • Enable file compression to increase the flexibility of volume usage.
   • Perform defragmentation to increase system performance.
   • Data checksum is enabled by default and data scrubbing can be run to verify data integrity.
   • When file versioning is enabled in Cloud Station, it will not occupy additional storage on Btrfs file system. On other file systems, file versioning will occupy additional space equal to the size of each shared folder.
   • Files will be backed up once the backup task is started, even if the files are changed or deleted afterwards.
   • Converting existing ext4 file system to Btrfs is not supported. To store files under Btrfs file system you must create a new Btrfs volume and move the files to the new file system.
   • Available on the following models:
     • 16­-series: RS2416RP+, RS2416+, RS18016xs+, DS716+, DS216+
     • 15­-series: RC18015xs+, RS815RP+, RS815+, DS3615xs, DS2415+, DS1815+, DS1515+, DS415+
     • 14­-series: RS3614xs+, RS3614xs, RS3614RPxs
     • 13­-series: RS3413xs+, RS10613xs+
     • 12­-series: DS3612xs, RS3412xs, RS3412RPxs
     • 11­-series: DS3611xs, RS3411xs, RS3411RPxs
2. Service Modularization
   • Some of the DSM built­-in features have been modularized into packages to ensure better system maintenance and update flexibility.
   • Modularization in DSM 6.0 includes Storage Analyzer, Backup & Restore, PHP, Web Station and Text Editor, Log Center (with basic built­-in functions in DSM and extensive functions via package download), WebDAV and Snapshot Replication.
3. 64­-Bit Architecture
   • DSM 6.0 has been optimized for all models based on Intel 64­-bit processors to improve general performance.
   • Supports over 4GB memory allocation for one single process to deploy large scale application.
4. High Availability Manager
   • When a split­-brain error occurs in an HA cluster, you can designate one server as the active server and overwrite the data on the other server. No full data replication is required.
   • When a split­-brain error occurs, you can view the recent system information, iSCSI Target connection history and file difference in each shared folder.
   • Reduced the downtime for upgrading a cluster by 50%.
   • Reduced the time to bind and unbind a cluster by 20%.
   • Reduced the occurrence of split­-brain errors.
   • Supports Docker DSM.
5. High Availability Manager for RC18015xs+
   • Supports Virtual DSM.
   • Supports Docker DSM.
6. Backup & Replication
   • Backup & Replication features are now available in ​add-­on packages Hyper Backup ​(backup client) and Hyper Backup Vault ​(backup server). The existing Backup & Replication task settings will be migrated to the new package automatically upon upgrading to DSM 6.0. Some settings are relocated to Control Panel:
     • rsync: Control Panel > File Services > rsync
     • Shared Folder Sync: Control Panel > Shared Folder Sync
     • For features of Hyper Backup ​and Hyper Backup Vault​, please refer to the What’s New in the Packages section.
7. Security
   • CSP support can effectively prevent XSS attacks.
   • TLS/SSL profiles can be adjusted according to your browser compatibility and security requirements.
   • Root account is replaced by administrators group credentials to log into SSH to enhance security.
8. Certificate
   • The integration of Let’s Encrypt helps provide your Synology NAS with secure connection easily and effortlessly.
   • Multiple certificates are now supported to increase the flexibility for hosting several different hostnames.
9. File Station
   • Supports mounting NFS shared folders on folders on Synology NAS.
   • Aviary photo editor is introduced to replace the existing service for a more intuitive interface.
   • Multiple files can be downloaded without being compressed into one giant file on Chrome browser (on Windows computers only).
10. Content Search
    • Search in File Station now allows you to match the document content or even the metadata of multimedia files for a more effective search result.
    • You can now use Mac Finder to quickly search the content of indexed files within mounted folders on your Synology NAS.
11. File sharing
    • Collect files via the intuitive File Request feature.
    • Customize the background picture and logo that you see when sharing files.
    • File sharing and file request have been redesigned for mobile interface to ensure a consistent user experience.
12. Accessibility
    • DSM is now accessible to visually impaired users.
    • Fully supported for accessibility in File Station, Desktop navigation, and Keyboard Shortcuts.
    • Six modules supported in Control Panel: Shared Folder, File Service, User, Group, QuickConnect, and Update & Restore > Update.
13. 2-­Step Verification
    • You can now add and manage your most frequently used devices as trusted devices without entering verification code every time you log in.
14. QuickConnect
    • Relay service can now be disabled to meet enterprise policies.
15. 802.1X
    • Added support of 802.1X authentication for wired networks.
16. Firewall
    • Organize your firewall rules into different profiles.
17. DHCP Server
    • Supports standard DHCP options.
    • Supports vendor specific options.
    • Supports downloading PXE boot loader files from remote TFTP servers.
18. SSD Cache
    • Create an SSD cache consisting of up to 12 SSD devices.
    • When SSD cache is enabled on a volume with advanced iSCSI LUNs, the performance can be improved up to 30%.
    • You can now use different SSD models to create an SSD cache.
19. Storage Manager
    • Configure the description for volumes and Disk Groups.
    • For RAID Groups, the number of disks for each RAID Array can be 6, 12 or 24.
20. Customized Domain Name for DSM
    • Customized domain name can now be used for accessing DSM more easily.
21. Application Portal
    • DSM can now serve as a reverse proxy server.
    • Customized domain name can now be used for directly accessing Synology applications.
22. Dynamic DNS Support
    • Added new DDNS provider TWNIC to support domain names with Traditional Chinese characters.
23. Web Enhancement
    • HTTP compression can be enabled to effectively compress packets to reduce the size of web transfer.
    • HTTP/2 is now supported as an replacement of SPDY to increase the transfer speed for high latency connection.
24. DSM mobile
    • Comes with a brand new user interface.
    • View and update your DSM version directly.
    • Added support for updating packages in Package Center.
    • Displays volume and disk information in Storage Manager.
    • Displays memory composition in Resource Monitor.
25. Theme Change
    • Light and dark themes are supported for changing the system style within DSM.
26. Keyboard Shortcut
    • When typing in the text fields, keyboard shortcuts will be temporarily disabled to avoid unintentional entries.
27. Resource Monitor
    • You can view the throughput, latency, IOPS, IO Size and queue depth of each iSCSI LUN.
28. Task Scheduler
    • You can now view the status of last run tasks to monitor the results.
29. Package Center
    • Packages are divided into two main categories, Synology and Third­-party, for better recognition.

What’s New in Packages

1. Virtual DSM Manager (Beta)
   • Run multiple Virtual DSM instances on a single server using the virtualization technology.
   • Perform live migration of virtual machines by relocating a virtual machine from one host to another in just a few minutes without interruption while keeping its storage unchanged.
   • 4GB RAM or more is required to run Virtual DSM. System with less than 4GB RAM can only be used as a storage resource.
   • Virtual DSM Manager is not supported on hosts running Synology High Availability.
   • The beta program will continue after DSM 6.0 official release.
   • Available on the following models:
     1. 16­-series: RS2416RP+, RS2416+, RS18016xs+
     2. 15­-series: RS815RP+, RS815+, DS3615xs, DS2415+, DS1815+, DS1515+, DS415+
     3. 14­-series: RS3614xs+, RS3614xs, RS3614RPxs
     4. 13­-series: RS3413xs+, RS10613xs+
     5. 12­-series: DS3612xs, RS3412xs, RS3412RPxs
     6. 11­-series: DS3611xs, RS3411xs, RS3411RPxs
2. Docker DSM (Beta)
   • Run multiple Docker DSM instances on a single server using the container technology.
   • A Btrfs volume is required to store Docker DSM data. System data can be backed up and replicated.
   • Available on the following models:
     1. 16­-series: RS2416RP+, RS2416+, RS18016xs+, DS716+, DS216+
     2. 15­-series: RS815RP+, RS815+, DS3615xs, DS2415+, DS1815+, DS1515+, DS415+
     3. 14­-series: RS3614xs+, RS3614xs, RS3614RPxs
     4. 13­-series: RS3413xs+, RS10613xs+
     5. 12­-series: DS3612xs, RS3412xs, RS3412RPxs
     6. 11­-series: DS3611xs, RS3411xs, RS3411RPxs
3. Snapshot Replication
   • Snapshot Replication is now a stand-­alone package. It is previously named as Snapshot & Replication​in DSM 6.0 Beta and Data Protection Manager ​in DSM 5.2.
   • Shared Folder Snapshot
     1. Take a snapshot of shared folders up to every 5 minutes.
     2. View snapshot data in all file services or File Station, or by clicking the Previous Versions tab in the Properties dialogue box in File Explorer on Windows PC.
     3. Increase the maximum snapshot versions of a shared folder to 1024 for all currently available models (except for DS216+ on which the number is limited to 256).
     4. Limit the maximum snapshot versions of all the shared folders to 65536 for all currently available models (except for DS216+ on which the number is limited to 4096).
     5. Supports shared folders located on Btrfs volumes.
   • Shared Folder & LUN Replication
     1. Replicate your data in shared folders and iSCSI LUNs from one server to another by taking and sending a snapshot to the remote server.
     2. Extend a replication by replicating data from a destination server to another secondary destination server to make multiple copies of your data.
     3. Replicate one shared folder or iSCSI LUN to up to 3 destination servers from the same source server.
     4. Limit the maximum number of replication tasks to 64.
     5. Statistics of transferred size and sync duration are recorded and displayed as a report.
     6. Allows administrator users to export the replicated data to external devices, and then deliver and import it to the recovery site, reducing bandwidth usage in your production environment.
     7. Provides an overview topology to show how your replicas are stored.
     8. Supports port forwarding by customizing address and port of a replication task.
     9. Now you can encrypt replication transmission.
     10. iSCSI LUN replication can be managed via Synology Snapshot Replication or VMware vCenter Site Recovery Manager. (Installing Synology SRA on VMware Site Recovery Manager servers is required.)
     11. Only Advanced iSCSI LUNs and shared folders on Btrfs volumes are supported.
   • Recovery
     1. You can perform a failover on shared folders or iSCSI LUNs by making the replicas on the destination server writable when the source server is not healthy.
     2. You can perform a test failover to make a clone and run all necessary tests in the event of disaster.
     3. You can perform a force failover when the source server is healthy.
     4. After performing a failover, you can perform a re-­protect action to sync data on two servers again.
     5. When performing a re­-protect action, you can choose either of the servers to sync data from and choose the new source server for the replication task.
   • Available on the following models:
     1. 16­-series: RS2416RP+, RS2416+, RS18016xs+, DS716+, DS216+
     2. 15­-series: RC18015xs+, RS815RP+, RS815+, DS3615xs, DS2415+, DS1815+, DS1515+, DS415+
     3. 14­-series: RS3614xs+, RS3614xs, RS3614RPxs
     4. 13­-series: RS3413xs+, RS10613xs+
     5. 12­-series: DS3612xs, RS3412xs, RS3412RPxs
     6. 11­-series: DS3611xs, RS3411xs, RS3411RPxs
4. MailPlus Server (Beta)
   • Please note that the Beta program will continue after DSM 6.0 official release.
   • Starting from MailPlus Server 1.0 official release, MailPlus Server will include 5 free mail accounts by default, and licenses will be required for additional mail accounts. During the Beta program, no licenses will be required for any email accounts.
   • MailPlus Server provides enterprise­-grade mail server features and advanced active-­active architecture, allowing administrator to set up a high-­availability mail system with single server fault-­tolerance and load-­balancing abilities.
   • Active-­active mechanism ensures two-­way syncing of data between both servers to maximize the uptime for the mail system.
   • Load balancer smartly distributes incoming messages to ensure that the loadings on the two nodes are evenly balanced.
   • The specially designed algorithm allows you to search email content with a given keyword for an even more accurate result.
   • The spam-­filter has a much enhanced anti­-spam ability, especially for Chinese spams, by using implemented algorithm to analyze the meaning of the statement.
   • Customize spam filters by keywords for precise spam blocking.
   • The migration from the existing Mail Server to MailPlus Server is made seamless to let you continue using the previously hosted mail service.
   • Supports application backup in the Hyper Backup package.
   • Enhanced anti­-malware and anti-­virus protection by integrating Google Safe Browsing and third­-party database.
   • Message Content Protection (MCP) allows you to filter or block the mails that match MCP rules.
   • Penpal auto whitelisting mechanism ensures that the mails from the contacted senders will not be marked as spam.
   • You can forward mail logs to both the server not being used as load balancer in the mail cluster for log backup and the syslog server for centralized log management.
   • You can now disable full-­text search for selected accounts to utilize the server resources.
   • Usage analysis provides an efficient way to calculate email quantity of the selected users, allowing the administrators to easily monitor the mail traffic by accounts.
   • MailPlus Server will be available on the following models:
     1. 16­-series: RS18016xs+, RS2416+, RS2416RP+, DS716+, DS216+
     2. 15­-series: RC18015xs+, DS3615xs, DS2415+, DS1815+, DS1515+, RS815+, RS815RP+, DS415+
     3. 14­-series: RS3614xs+, RS3614xs, RS3614RPxs, RS2414+, RS2414RP+, RS814+, RS814RP+
     4. 13­-series: DS2413+, RS10613xs+, RS3413xs+, DS1813+, DS1513+, DS713+
     5. 12­-series: DS3612xs, RS3412xs, RS3412RPxs, RS2212+, RS2212RP+, DS1812+, DS1512+, RS812+, RS812RP+, DS412+, DS712+
     6. 11­-series: DS3611xs, DS2411+, RS3411xs, RS3411RPxs, RS2211+, RS2211RP+, DS1511+, DS411+II, DS411+
5. MailPlus (Beta)
   • Please note that the Beta program will continue after DSM 6.0 official release.
   • MailPlus is a powerful webmail service that provides rich features. The beautifully designed user interface and functionality help you work intuitively on your everyday email with efficiency.
   • Organize your email with the physical mailboxes or assign multiple attributes onto the email by applying labels for an intuitive and convenient email management.
   • Send and receive mail to and from other mail servers with the customizable SMTP service and POP3 fetch function.
   • Find and manage your email efficiently with the smart search function.
   • Filters automatically moves your incoming or outgoing email to the appointed mailbox or applies labels.
   • Customize wallpaper and theme settings.
   • Enrich your email content with the built­-in stickers.
   • With Synology Web Clipper, you can easily save the conversation in MailPlus to Note Station for management.
   • Supports attaching files from DSM.
   • Supports undo operation for Delete/Move/Archive/Set read & unread/Apply & remove label actions.
   • Customize auto-­reply messages for different senders.
   • Supports browsing history.
   • You can now auto-­empty Spam/Trash mailboxes on logout.
   • Clip long email messages to shorten loading time.
   • List email addresses according to contact frequency when specifying the sender/recipient.
   • Group contacts will be displayed when specifying the sender/recipient in the mail composer.
   • Task progress will be displayed after setting up the filters.
   • Supports keyboard shortcuts to view and manage messages more efficiently.
   • Overall performance enhancement including improved email loading and deleting performance.
   • MailPlus will be available on the following models:
     1. 16­-series: RS18016xs+, RS2416+, RS2416RP+, DS716+, DS216+
     2. 15­-series: RC18015xs+, DS3615xs, DS2415+, DS1815+, DS1515+, RS815+, RS815RP+, DS415+
     3. 14­-series: RS3614xs+, RS3614xs, RS3614RPxs, RS2414+, RS2414RP+, RS814+, RS814RP+
     4. 13­-series: DS2413+, RS10613xs+, RS3413xs+, DS1813+, DS1513+, DS713+
     5. 12­-series: DS3612xs, RS3412xs, RS3412RPxs, RS2212+, RS2212RP+, DS1812+, DS1512+, RS812+, RS812RP+, DS412+, DS712+
     6. 11­-series: DS3611xs, DS2411+, RS3411xs, RS3411RPxs, RS2211+, RS2211RP+, DS1511+, DS411+II, DS411+
6. SpreadSheet
   • Allows you to host your collaboration drive and work easily with others by sharing spreadsheets.
   • Customize access permissions for guests, DSM users and groups, and set read/write privileges for specific spreadsheets.
   • Multiple users can edit the same spreadsheet simultaneously and see the modifications in real time.
   • View the revision history and restore the spreadsheet to a previous version.
   • Manage your spreadsheets with multiple attributes by adding tags to individual spreadsheets and quickly find them later.
   • Supports import and export of other spreadsheet formats.
   • Supports data validation, conditional formatting, filter and spelling check.
   • Spreadsheet encryption is supported to protect confidential spreadsheets.
   • Supports application backup in the Hyper Backup package.
   • Range selection is supported in SpreadSheet functions.
   • Supports selecting multiple rows/columns/cells by pressing and holding the "Ctrl" key.
   • Over 300 formulas are supported.
   • SpreadSheet Function List is provided with instructions on frequently used functions and usage examples.
   • Allows you to insert images to spreadsheets.
   • You can now print your spreadsheets.
   • SpreadSheet will not be available on the following models due to the restriction of Node.js version:
     1. 13­-series: DS213, DS213air, DS413j, DS213+, DS413
     2. 12­-series: DS112, DS112+, DS112j, DS212, DS212+, DS212j, RS212, RS812
     3. 11­-series: DS111, DS211, DS211+, DS211j, DS411, DS411j, DS411slim, RS411
7. Surveillance Station 7.2
   • Surveillance Station has been optimized for models based on Intel 64­-bit processors to improve general performance.
   • Added support for I/O modules from Advantech ADAM­-6050, ADAM-­6052, ADAM-­6250, ADAM-­6266 and AXIS P8221.
   • Added support for running Surveillance Station on both Virtual DSM and Docker DSM. (Please note that Surveillance Station running on Virtual DSM or Docker DSM does not include any default surveillance device licenses.)
   • Added support for 2­-step verification using one-­time password (OTP) for DSM 6.0 to provide extra security.
8. PetaSpace
   • PetaSpace is an application that combines the capacity of multiple volumes into a larger volume group. With PetaSpace, data of a single shared folder can now be located across multiple volumes, thus allowing you to store, manage, and access the growing amount of data more efficiently and flexibly.
   • Available on the following models:
     1. 16­-series: RS18016xs+
     2. 15­-series: RC18015xs+, DS3615xs
     3. 14­-series: RS3614xs+, RS3614xs, RS3614RPxs
     4. 13­-series: RS3413xs+, RS10613xs+
     5. 12­-series: DS3612xs, RS3412xs, RS3412RPxs
     6. 11­-series: DS3611xs, RS3411xs, RS3411RPxs
9. Cloud Station Server
   • Added support for setting user and group speed limit.
   • Integrated with DSM application privilege settings.
   • Offers Intelliversioning version rotation algorithm.
   • Run Cloud Station Server without enabling home service.
   • Enforce 2­-step verification to strengthen identity security.
   • Supports renaming shared folders when Cloud Station Server is running.
   • Supports symbolic links.
   • Supports files containing "/" characters on Mac.
   • Now allows you to select multiple files/folders for restoration in Version History.
   • Raised concurrent file transfer number to 10,000 on selected models (RS18016xs+, RC18015xs+, RS3614xs+, RS10613xs+, RS3614xs, and DS3615xs; memory expansion to 32GB required).
   • Optimized small file processing performance.
   • Optimized 1st-­time synchronization performance.
   • Optimized as a backup target.
10. Cloud Station ShareSync
    • Configure upload­-only or download-­only tasks.
    • Customize conflict policies by each ShareSync device.
    • Enhanced host search algorithm used in QuickConnect connections.
    • Supports encrypted shared folders.
    • Now allows "surveillance" and "photo" shared folders to be synchronized with a shared folder under a different name.
    • Now advanced consistency check can be disabled.
    • Optimized memory usage.
11. Cloud Station Drive
    • Synchronize any folders on your Synology NAS.
    • Configure download­-only tasks.
    • Customize conflict policies by each PC.
    • Integrated with DSM 2­-step verification.
    • Integrated with Windows VSS (Volume Shadow Copy Service).
    • Enhanced host search algorithm used in QuickConnect connections.
    • Enhanced user experience and graphic interface.
    • Now advanced consistency check can be disabled.
    • Added minimalist system tray icons to better suit the OS themes of modern computers.
    • Enhanced the installation GUI on Mac.
    • Optimized memory usage.
12. Cloud Station Backup
    • Back up the data on your personal computers running Windows, OS X, Ubuntu and Fedora operating systems.
    • Retains up to 32 versions of every backed up file and supports file filtering. (Please refer to the software specifications for supported OS versions.)
13. Cloud Sync
    • Synchronize a specified folder on the public cloud with a folder on Synology NAS.
    • Configure multiple sync tasks in a single connection.
    • Sync a folder to multiple public cloud destinations.
    • Choose never to remove the data on the destination.
    • Supports read-­only shared folders.
    • Supports encrypted shared folders.
    • You can now customize the number of files to be concurrently uploaded/downloaded.
    • You can now convert Google Docs to Microsoft Office or jpeg formats in download­-only tasks to keep an offline backup copy.
    • Last modified time of synced files will be updated to Dropbox.
    • Now advanced consistency check can be disabled.
    • Supports creating a new remote folder during task creation.
    • Supports application privilege settings by group and IP.
    • Added support for:
      1. Microsoft OneDrive for Business and Office 365
      2. Microsoft OneDrive’s new API
      3. HiDrive
      4. Amazon S3 Standard -­ Infrequent Access storage class
      5. Amazon S3 Seoul region
    • Reorganizes the order of public cloud services by device location.
    • Supports OpenStack keystone v3.
    • Now offers Windows and Linux decryption tools for data recovery.
    • Optimized memory usage.
    • Raised the minimum polling period to 10 seconds.
14. Directory Server
    • The Provider­-Consumer architecture in Directory Server allows the account data to be continuously replicated from a "Provider" Synology NAS to one or more "Consumer" servers. This ensures that the connection between the clients and the server will not be affected even when the Provider server is unavailable.
    • Password strength policy can now be applied to user accounts for better security.
    • You can enforce regular and periodical password update to enhance security. In addition, password expiration reminders will automatically notify users to update their passwords via email or upon login.
15. Video Station
    • Brand new visual design in contrasting black and red accentuates your video collections.
    • Offline transcoding can make you transcode and download video collections in advance. You can enjoy them even without available internet connection.
    • Use the new home page to browse all recently added videos in each library and the top banner in homepage will recommend you the best films.
    • On­screen buttons allow smoother and more intuitive operation.
    • Stream videos from Video Station to Chromecast with the Google Cast extension (available on Chrome Web Store).
    • Provided an option to disable metadata auto download for specific folder.
    • Provided more detailed information, such as FPS, sample frequency, and multiple audio tracks.
    • Added functions to edit video ratings and change the backdrop.
    • Customize library visibility according to your own preferences.
    • Subtitle size now can be adjusted to fit your preference.
16. Hyper Backup
    • Back up folders, packages, and DSM configurations to a multi­-version repository and save backed up data in image formats to maximize storage efficiency while retaining up to 65,535 versions for retrieval.
    • Supports flexible version control:
      1. Regular or Smart Recycle rotation is supported.
      2. Version lock prevents a specific version from automatic rotation.
    • Supports a variety of destinations:
      1. Local shared folders and external storage devices.
      2. Shared folders and external storage devices on a remote server.
      3. Public cloud destinations including Amazon S3, S3­-compatible storage, Microsoft Azure (Global and China), HiDrive, hubiC, IBM SoftLayer, RackSpace, and other OpenStack Swift compatible servers.
    • Supports granular recovery:
      1. Use web-­based Backup Explorer to browse through backup versions and files.
      2. Allows single file restoration.
    • Supports portable backup repositories:
      1. Export the initial backup version to an external storage device and deliver the external storage device to the destination for data uploading.
      2. Reuse a backup repository by relinking.
    • Full­-fledged security features:
      1. Enable client-­side encryption to ensure data confidentiality at the backup destination.
      2. Supports transmission encryption.
      3. Supports backing up encrypted shared folders.
    • Supports Amazon S3 Standard -­ Infrequent Access storage class.
    • Supports backing up symbolic links.
    • Supports port forwarding from a customized port of a backup task to a Synology NAS or a rsync server.
    • Now you can compress your files before transmitting them to the backup target, saving the network bandwidth and storage consumption.
    • Now allows multiple restore/download/copy tasks to run concurrently in Hyper Backup Explorer.
    • With Hyper Backup installed, you can launch the Hyper Backup Explorer by clicking the backup target in File Station.
    • Upgrade and migration:
      1. The Backup & Restore ​package will be automatically migrated to Hyper Backup upon upgrading from DSM 6.0 Beta 1.
      2. The Backup & Replication ​package will be automatically migrated to Hyper Backup upon upgrading from DSM 5.2.
17. Hyper Backup Vault
    • Hyper Backup Vault is a new package and will be automatically installed upon upgrading to DSM 6.0.
    • You can enable backup services to allow another Synology NAS to back up to your Synology NAS via Hyper Backup.
    • Provides an overview of the Hyper Backup targets backed up by other Synology NAS servers.
    • Provides the information of each backup target, such as path, space usage, last backup time, backup duration and backup logs.
    • With Hyper Backup Vault installed, you can launch the Hyper Backup Explorer by clicking the backup target in File Station.
18. Hyper Backup Explorer​(for Windows and Linux)
    • Now you can use Hyper Backup Explorer to browse backup data right from your Windows and Linux computers.
19. Note Station
    • Offline Note Station is now available in Chrome Web Store. You can create and edit notes or to-­do lists without Internet connection, and all updates will be synchronized to Note Station in DSM when the Internet is connected.
    • Use Synology Web Clipper to save selected content of MailPlus or Gmail to Note Station.
    • Convert tables into charts, including line charts, bar charts, and pie charts.
    • Choose a template for your presentation.
    • Click to expand images to their original size in presentation mode.
    • Apply heading formats to texts to switch slides in presentation mode.
    • Create Smart Notebooks according to different criteria. Existing and future notes that match the criteria will be automatically added to the Smart Notebook.
    • Insert the internal link of another note and open it directly via the hyperlink.
    • The search feature in Note Station now includes results based on the content of attached files of various formats, including PDF, Office, Open Office, and iWork file.
    • The attachments in PDF, word, excel, and powerpoint formats can be previewed in Note Station directly with the Document Viewer package.
    • You can add stars, remarks and subtasks to to-­do tasks.
    • You can share notes or notebooks with a group.
    • Supports exporting/importing to­-do tasks for backup.
    • Allows you to output to-­do tasks to a new note and customize its display options.

20. PDF Viewer/Document Viewer

    • View various popular document formats on DSM, including Microsoft Office and Open Office files (Document Viewer only).
    • Brand-­new designed user interface with comprehensive tools including rotation, zoom­-in/out, search, and much more.
    • Securely share your confidential documents by disabling the download, select & copy, and print functions.
    • Outline mode helps you quickly find the desired section in the document.
    • Drag mode can be extremely useful when viewing large pictures in the document.
    • Attachments can be collected for quick browsing.
    • Document Viewer is available on the following models:
      1. 16­-series: RS18016xs+, RS2416+, RS2416RP+
      2. 15­-series: RC18015xs+, DS3615xs, DS2415+, DS1815+, DS1515+, RS815+, RS815RP+, DS415+
      3. 14­-series: RS3614xs+, RS3614xs, RS3614RPxs, RS2414+, RS2414RP+, RS814RP+, RS814+, RS10613xs+, RS3413xs+
      4. 13­-series: RS10613xs+, RS3413xs+, DS2413+, DS1813+, DS1513+, DS713+
      5. 12­-series: DS3612xs, RS3412RPxs, RS3412xs, RS2212RP+, RS2212+, DS1812+, DS1512+, RS812+, RS812RP+, DS712+, DS412+
      6. 11­-series: DS3611xs, RS3411xs, RS3411RPxs, DS2411+, RS2211RP+, RS2211+, DS1511+, DS411+II, DS411+

21. Intrusion Prevention (Beta)

    • Intrusion Prevention guards your Synology NAS from network threats. With its rule database, malicious packets can be identified to prevent malicious parties from infecting and compromising your Synology NAS.

22. Antivirus -­ McAfee

    • Upgraded ClamAV and McAfee scanning engine.
    • Fixed an issue where operations might fail when deleting or restoring a large amount of files from the quarantine.
    • Fixed an issue where DSM system files might be deleted due to false alarm.
23. Antivirus -­ Essential
    • Upgraded ClamAV and McAfee scanning engine.
    • Fixed an issue where operations might fail when deleting or restoring a large amount of files from the quarantine.
    • Fixed an issue where DSM system files might be deleted due to false alarm.
24. VPN Server
    • Enhanced transmission performance of PPTP/L2TP.
    • Minor bug fixes.
25. Web Station
    • Each Virtual Host can be set with an individual setting including PHP version, server backend, document root and secure connections.
    • More PHP extensions are supported to increase the flexibility of your own web site.
26. Media Server
    • Supports hardware transcoding on DS216play, DS716+, and DS216+.
    • Fixed an issue where video may not be sought when streaming videos from DS216play and DS716+.
    • Minor bug fixes.
27. Logitech Media Server
    • Updated the stable version to 7.7.6.
28. Audio Station
    • Provides year information in album list.
    • Provides folder path of playlist for better recognition.
    • Enhanced browsing performance.
    • Added support for multi­-genre, allowing you to classify music more flexibly.
    • Added an artist category in genre.
29. Photo Station
    • Added support for watermark to help protect the copyright of your photos.
    • The plugin in WordPress, Joomla, and Drupal allows you to access Photo Station directly and add photos or albums to these three platforms.
    • Windows AD and LDAP users can use Personal Photo Station now.
    • Supports html script for embedding Photo Station to other websites.
    • Security enhancement with XSS attack prevention.
    • Extend file size limitation of uploading and playing videos from 2GB to 32GB for 64 bits models.
    • Added a feature to prevent photos from being embedded via HTML iframe.
    • Supports migration flow to export Photo Station blog and import to WordPress.
    • Adjusted re­-order flow and new method to create a new album on photo wall.
    • Shows photo shooting time and geolocation information on lightbox as well as slideshow mode.
30. Docker
    • Upgraded to Docker 1.9.
    • Supports Docker Compose.
31. Download Station
    • Download files from more file hosting sites.
    • Added support for more premium accounts.
    • Added support for downloading tasks that require CAPTCHA passwords.
    • Personal notification is supported so every user can set their personal email to receive notifications.
    • File hosting plugin can be updated automatically.
    • Degraded NZB files can be repaired with .par2 files.
32. Storage Analyzer
    • Supports the application backup in the Hyper Backup package.
33. CardDAV
    • You can now edit contact information in DSM.
    • You can quickly build your contact list by importing data.
    • Supports exporting contact information to be used in other software.
34. Java 7/8
    • Java derives much of its syntax from C and C++ but has a simpler object model and fewer low-­level facilities than either.
    • Java Manager is replaced by the new Java package for a more convenient installation procedure.
    • You may enjoy the built­-in Java or manually install Java from Oracle for enhanced compatibility.

Known Issues & Limitations

1. For locally modified files in a read­-only sync folder, the status will always be "syncing" in DS cloud.
2. Re-­enabling indexing services previously set will be required when you upgrading DSM 6.0.
3. Upgrade to DSM 6.0 will trigger media indexing for Audio Station browsing enhancement.
4. Because of structure change, some notifications that occurred before the upgrade could abnormally displayed. All notifications generated after upgrading to DSM 6.0 will be shown normally.
5. MailPlus and MailPlus Server:
   • Initial retrieval of mail using the POP3 fetch function may take longer than usual.
   • MailPlus Server is required to be configured before running MailPlus.
   • MailPlus is required to be installed on both Synology NAS devices to ensure stability when switching load balancing services from one server to the other for MailPlus Server.
   • Both Synology NAS devices must have identical MailPlus application portal and privilege settings to ensure stability when switching load balancing services from one server to the other for MailPlus Server.
   • To upgrade the MailPlus Server in active­-active mode from Beta 1/Beta 2 version to the official version, it is required to remove the cluster mechanism first and upgrade two nodes separately. After the upgrade, set up the active-­active cluster with two nodes again and the data will be synced automatically. Such initiative will not be required after DSM 6.0.
6. The function to customize library visibility will not be applied to DS video in the following mobile platforms: iOS, Windows Phone, Roku TV, and Samsung TV.
7. After converting the permission type to ACL, the settings in Photo Station and File Station may still be inconsistent. For better user experience, the shared folder "photo" will be converted automatically back to Linux mode if you have done the ACL conversion in DSM 6.0 RC.