Release Notes for DS1821+

(2024-12-03)

Important notes

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 update it manually.
   • 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.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. This update will restart the device.
3. To enhance product security, the following packages will require a manual update after this release. Please go to the Package Center and click Repair to install the latest versions:
   • Synology Drive Server 3.0.4-12699
     • Note: After repairing Synology Drive Server, Synology Office will not auto-enable. Please go to Package Center > Synology Office and click Run.
   • Replication Service 1.0.12-0066

Fixed Issues

1. Fixed multiple security vulnerabilities (Synology-SA-24:02).
2. Fixed multiple security vulnerabilities (Synology-SA-24:01).
3. Fixed multiple security vulnerabilities (Synology-SA-23:05).
4. Fixed security vulnerabilities regarding netatalk (CVE-2024-38439, CVE-2024-38440, CVE-2024-38441).
5. Fixed a security vulnerability regarding Terrapin Attack (CVE-2023-48795).
6. Fixed a security vulnerability (Synology-SA-24:20).

(2023-05-02)

Important notes

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 update it manually.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. Depending on your Synology NAS model, this update will restart the device.
3. AAC-encoded content can be decoded and natively played back by most end devices, such as smartphones, tablets, computers, and smart TVs. Server-side transcoding of AAC-encoded content has been a redundant and resource-consuming process that was removed in DSM 6 starting from this version.
4. For the following packages to be available after this update, users must go to the Package Center and click Repair to install the latest version:
   • Advanced Media Extension 1.0.2-0039
   • Audio Station 6.5.7-3383
   • Media Server 1.8.5-2902
   • Video Station 2.5.1-1668
5. Moments and Photo Station will resume working once Advanced Media Extension is updated to the latest version.

Compatibility & Installation

1. The following drives will be updated automatically to the latest firmware version to fix an unexpected issue that may occur during repair or other read/write operations: HAT5300-4T (firmware version 1401 and 1402), HAT5300-16T (firmware version 1401), HAT5310-8T (firmware version 1401), and HAS5300-16T (firmware version 1401).

What’s New

1. When users select Outlook as the system notification service provider, they will need to sign in with OAuth 2.0, which is a safer authentication method. Previously configured Outlook accounts will be migrated to "Custom SMTP server". We strongly recommend re-configuring the settings for authentication to ensure your Outlook account security.

Fixed Issues

1. Fixed an issue where files shared via SMB may not be discoverable through macOS Ventura's Spotlight search.
2. Fixed an issue where files shared via AFP may not be discoverable through macOS Ventura's Spotlight search.
3. Fixed an issue where a Synology NAS running DSM 7.2 may be unable to update its domain database after syncing data from a domain controller running DSM 6.2.4.
4. Fixed a security vulnerability (Synology-SA-22:23).

(2022-05-24)

Important Note

1. The update is expected to be available in all regions shortly, while the time of release in each region vary slightly. If you want to update your DSM to this version now, please click here.
2. Only Synology NAS with DSM 6.2.4 installed can be updated to this version.

Fixed Issues

1. Fixed multiple security vulnerabilities regarding Netatalk (Synology-SA-22:06).

(2022-02-22)

Important Note

1. The update is expected to be available in all regions shortly, while the time of release in each region vary slightly. If you want to update your DSM to this version now, please click here.
2. Only Synology NAS with DSM 6.2.4 installed can be updated to this version.

Fixed Issues

1. Fixed an issue where users couldn’t add Google or Outlook accounts at Personal > Email Delivery.
2. Fixed an issue where sending a test email would fail if users selected Outlook as the service provider.
3. Fixed multiple security vulnerabilities. (Synology-SA-22:03)
4. Fixed an issue where filters might not work when users edit domain user or group privileges at Control Panel > Application Privileges.
5. Fixed an issue where Avid Pro Tools couldn't save files via SMB.

(2022-01-27)

Important Note

1. The update is expected to be available in all regions shortly, while the time of release in each region vary slightly. If you want to update your DSM to this version now, please click here.
2. Only Synology NAS with DSM 6.2.4 installed can be updated to this version.

Fixed Issues

1. Fixed a security vulnerability regarding Samba (Synology-SA-22:02).

(2022-01-11)

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 6.2.4 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.

Fixed Issues

1. Fixed an issue where package logs weren't rotated after a switchover was performed on SA3200D.
2. Fixed an issue where Synology Account might be signed out unexpectedly.
3. Updated the renewal rule of the built-in certificate to prevent DSM connection errors.
4. Fixed an issue where users couldn't expand a RAID 1 storage pool on the active server in a Synology High Availability cluster when the active server's RAID 1 storage pool is smaller than the one on the passive server.
5. Fixed multiple security vulnerabilities. (Synology-SA-22:01)

(2021-09-01)

Important Note

1. DSM 6.2.4-25556-2 is updated on September 1 to fix the issues below.
   • Fixed an issue where the Synology Account sign-in status at Control Panel > QuickConnect was incorrectly shown as not signed in.
   • Fixed an issue where exFAT Access package installation might fail.
   • Fixed an issue where users couldn't use SSH transfer encryption for Shared Folder Sync tasks.
   • Fixed an issue where Active Insight might not be able to automatically collect and transfer diagnostic data when users submitted technical support forms.
2. Disables the "Shut down UPS when the system enters Safe Mode" option by default.
3. Audio Station must be updated to version 6.5.6-3377 or above to be compatible with this update.
4. Media Server must be updated to version 1.8.1-2876 or above to be compatible with this update.
5. Surveillance Station must be updated to version 8.2.9-6459 or above to be compatible with this update.
6. Virtual Machine Manager must be updated to version 2.4.1-9259.

What's New

1. Added support for Synology Active Insight, which provides an option for automatic delivery of diagnostic data to Synology Technical Support upon submission of a support ticket for a faster troubleshooting process. This option is configurable at DSM > Support Center.
2. Added log entries for drive removal.

Fixed Issues

1. Fixed an issue where the domain group list wasn't updated correctly.
2. Fixed an issue where administrator users couldn't sign in to DSM after they reset their password by pressing the RESET button.
3. Fixed an issue where all input fields across DSM were auto-filled with DSM account name if users had had Google Chrome remember their password with the Autofill function.
4. Fixed an issue where Finder might stop responding when users search for content within mounted folders on macOS Big Sur 11.1 and 11.2.
5. Fixed an issue where after users updated to DSM 6.2.4, iSCSI targets mapped with LUNs created on DSM 6.0 and before became offline and couldn't be enabled.
6. Fixed an issue where signing in via 2-step verification generated an extra log entry.
7. Fixed an issue where deleted files from the home folder couldn't be found in the recycle bin if deleted via SMB.
8. Fixed an issue where there is a slight possibility that the SMB service might be shortly disconnected the moment users apply SMB setting modifications.
9. Fixed an issue where backing up data on Windows using Windows Server Backup or other third-party software to Synology NAS might fail after users updated their Windows with updates released since April 2021.
10. Updated the OpenSSL setting in response to new rules of Let's Encrypt certificates.
11. Fixed an issue where there might be an incorrect IP conflict message for VLANs.
12. Fixed an issue where DHCP settings of one network interface might be wrongly applied to another interface whose DHCP settings hadn't been enabled.
13. Fixed an issue where CMS-managed servers might disconnect from a CMS Host that has been updated to DSM 6.2.4.
14. Adjusted the LED indicator behavior for drive hibernation and deep sleep, making the LED status easier to distinguish on the following 15-series and 16-series models: DS916+, DS716+II, DS716+, DS416, DS416play, DS415+, DS415play, DS216+II, DS216+.
15. Fixed an issue where the UPS server might not function properly after the system reboot.
16. Refines the description for abnormal S.M.A.R.T test results and specifies the problematic S.M.A.R.T attributes.
17. Fixed an issue where the system might not obtain the compatibility information of hot-swapped drives on expansion units.
18. Fixed an issue where Western Digital hard drives couldn't be detected upon bootup on the following models: RS4017xs+, RS3618xs, RS3617xs+, RS3617RPxs, DS3617xsII, DS3617xs.
19. Fixed an issue where the fan couldn't resume in full speed mode after a system reboot on models with the V1000 platform.
20. Fixed an issue where memory module error messages weren't displayed properly.
21. Enhanced the system performance when there is a large number of concurrent connections.
22. Fixed an issue where when the "Get user/group lists with NT4-compatible mode" option is enabled, domain users might not be able to sign in to Synology Contacts.
23. Fixed an issue where 15-series and newer models couldn't hibernate when there is a system error, such as a storage issue and hardware malfunction.
24. Adjusted the fan speed on SA3400 and SA3600 to fix a potential overheating issue when E10G18-T2 is installed.
25. Fixed an issue where users couldn't expand the LUNs on ext4 volumes that are already mapped to iSCSI Targets.
26. Adjusted the fan speed to fix a potential overheating issue when a Synology network interface card (E10G18-T1, E10G18-T2, E10M20-T1, E10G21-F2, E25G20-F2) is used as the Heartbeat connection in an SHA cluster or for Open vSwitch.
27. Fixed an issue where the system couldn't retrieve the full name of domain groups correctly after users click "Update domain data".
28. Fixed an issue where the status of domain users couldn't be displayed properly when the status is "lockout".
29. Fixed multiple security vulnerabilities regarding Samba (CVE-2020-14318, CVE-2020-14323, CVE-2020-14383, CVE-2020-27840, CVE-2021-20277).
30. Fixed multiple security vulnerabilities. (Synology-SA-21:22)

(2023-05-04)

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.
   • 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 includes fixes to the below issues mentioned in 6.2.4-25554.
   • Fixed an issue where external hard drives couldn't wake from hibernation on certain platforms (Grantley, Broadwell, Broadwellnk, Purley).
   • Fixed an issue where users could not sign in to Synology mobile apps after they had cleared the remembered device list in DSM 6.2.4.
3. This update will restart your Synology NAS.
4. Integrates the beep control options for degraded/crashed volumes and abnormal SSD caches.
5. The new LED indicator behavior makes the system status easier to distinguish on 15-series and newer models. (Learn more)
6. DNS Server must be updated to version 2.2.3-5028 or above to be compatible with this update.
7. LDAP Server must be updated to version 2.4.49-2515 or above to be compatible with this update.

Compatibility & Installation

1. Enhanced the password policy. Passwords must exclude usernames and descriptions, include both upper-case and lower-case letters as well as numerical digits. The minimum password length is 8 characters.
2. Fixed a compatibility issue between the Geminilake platform and virtual machines running Windows 10.
3. On a newly installed version of DSM, file rename and deletion log events for SMB will be enabled by default.

What's New

1. Users can now set 10 email addresses to receive system notifications.
2. Enhanced domain database synchronization performance by syncing only altered data.
3. Supports bad block detection on Synology SSDs.
4. Supports the updating of Synology HDD and SSD firmware directly via DSM.
5. Improved fan speed control based on the Synology network interface card temperature for 19-series and newer models.

Fixed Issues

1. Fixed an issue where the "Enable Web Assistant" option didn't work on NVR216 and NVR1218.
2. Fixed an issue where the date and time formats for scheduled tasks were inconsistent in the widget and system settings.
3. Fixed an issue where scheduled tasks may fail to be executed or modified.
4. Fixed an issue where tasks scheduled at a high frequency generated a lot of logs and occupied system partitions.
5. Fixed an issue where the custom welcome text may differ on the preview and actual login page due to character limits.
6. Fixed an issue where data could still be written to LUNs after the volume runs out of space.
7. Fixed an issue where if Wi-Fi dongles are installed, some available network interfaces weren't listed when users edit iSCSI targets.
8. Fixed an issue where iSCSI services may be unstable when the host is too busy or when users disable iSCSI targets and ending sessions simultaneously.
9. Fixed an issue where initiators couldn't connect to the iSCSI target after ethernet interfaces reconnect in a high-availability cluster.
10. Fixed an issue where packages may not operate properly when drives migrated from another Synology NAS cause volume ID conflicts.
11. Fixed an issue where users may not be able to find their Synology NAS in My Network Places on Windows when WS-Discovery isn't operating properly.
12. Fixed an issue where Log Center didn't record recycle bin enabling/disabling events.
13. Fixed a security vulnerability regarding Sudo. (Synology-SA-21:02)
14. Fixed multiple security vulnerabilities. (Synology-SA-21:03)

Limitations

1. In response to the enhancement of domain database synchronization efficiency, the domain user/group list will be updated once an hour when it is created with Synology Directory Server.

(2021-02-23)

Important Note

1. This update is recalled on March 8, 2021, because of an issue where external hard drives couldn't wake from hibernation on certain platforms (Grantley, Broadwell, Broadwellnk, Purley). The issue is fixed in version 6.2.4-25556.

(2020-12-16)

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.

(2020-11-19)

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.

(2020/11/19)

1. N/A. (This is the initial release of DS1821+)