UniFi OS 5.1.33 includes the improvements and bugfixes below.

Bundled

• UniFi Network 10.5.67
• Identity Sync Service 1.8.4

Bugfixes

• Fixed an issue where applications could fail to install or update.

UniFi OS 5.1.31 includes the improvements and bugfixes below.

Bundled

• UniFi Network 10.5.67
• Identity Sync Service 1.8.4

Improvements

• Improved Shadow Mode resiliency.
• Improved device stability.

Bugfixes

• Fixed the security issues mentioned in Security Advisory Bulletin 067.
• Fixed the security issues mentioned in Security Advisory Bulletin 069.

UniFi OS 5.1.31 includes the improvements and bugfixes below.

Bundled

• UniFi Network 10.5.67
• Identity Sync Service 1.8.4

Improvements

• Improved Shadow Mode resiliency.
• Improved device stability.

Bugfixes

• Fixed the security issues mentioned in Security Advisory Bulletin 067.
• Fixed the security issues mentioned in Security Advisory Bulletin 069.

UniFi OS 5.1.30 includes the improvements and bugfixes below.

Bundled

• UniFi Network 10.5.67
• Identity Sync Service 1.8.3

Improvements

• Improved Shadow Mode resiliency.
• Improved device stability.

UniFi OS 5.1.30 includes the improvements and bugfixes below.

Bundled

• UniFi Network 10.5.67
• Identity Sync Service 1.8.3

Improvements

• Improved Shadow Mode resiliency.
• Improved device stability.

UniFi OS 5.1.27 includes the improvements and bugfixes below.

Bundled application

• UniFi Network 10.4.57

Improvements

• Improved device stability.

UniFi OS 5.1.27 includes the improvements and bugfixes below.

Bundled application

• UniFi Network 10.4.57

Improvements

• Improved device stability.

UniFi OS 5.1.26 includes the improvements and bugfixes below.

Bundled application

• UniFi Network 10.4.57

Improvements

• Improved device stability.
• Improved hardware offloading.
• Improved Shadow Mode resiliency.
• Improved WAN failover resiliency.
• Improved IPS/IDS memory usage
• Updated Suricata to version 8.0.6.
• Requires Network Application 10.5.48 or newer.

Bugfixes

• Fixed an issue where "Remember Me" local login sessions expired sooner than expected following recent security updates.
• "Remember Me" sessions now remain active for up to 30 days. Re-authentication is still required after UniFi OS upgrades and console reboots.
• For the best authentication experience, use the UniFi Mobile App or unifi.ui.com.
• Fixed an issue where IPS/IDS rule updates could fail, resulting in no IPS/IDS rules being applied.
• Fixed an issue where WAN monitors could fail to resolve when using LAN DNS servers on WAN interfaces.
• Fixed incorrect RX error counts on RJ45 ports.
• Fixed an issue where PPPoE 1500 MTU could stop working after a reboot.
• Fixed an issue where remote mDNS hosts could not be discovered.
• Fixed an issue that could cause high swap memory usage when using SSL Inspection.

UniFi OS 5.1.26 includes the improvements and bugfixes below.

Bundled application

• UniFi Network 10.4.57

Improvements

• Improved device stability.
• Improved Shadow Mode resiliency.
• Improved WAN failover resiliency.
• Improved IPS/IDS memory usage.
• Updated Suricata to version 8.0.6.
• Requires Network Application 10.5.48 or newer.

Bugfixes

• Fixed an issue where "Remember Me" local login sessions expired sooner than expected following recent security updates.
• "Remember Me" sessions now remain active for up to 30 days. Re-authentication is still required after UniFi OS upgrades and console reboots.
• For the best authentication experience, use the UniFi Mobile App or unifi.ui.com.
• Fixed an issue where IPS/IDS rule updates could fail, resulting in no IPS/IDS rules being applied.
• Fixed an issue where WAN monitors could fail to resolve when using LAN DNS servers on WAN interfaces.
• Fixed an issue where PPPoE 1500 MTU could stop working after a reboot.
• Fixed an issue where remote mDNS hosts could not be discovered.

UniFi OS 5.1.19 includes the improvements and bugfixes below.

Bundled application

• UniFi Network 10.4.57

Improvements

• Improved backup restore resiliency.

Bugfixes

• Fixed an issue where a false “No DNS IP Address” message could appear on the screen in rare cases.
• Fixed the security issues mentioned in Security Advisory Bulletin 066.

UniFi OS 5.1.19 includes the improvements and bugfixes below.

Bundled application

• UniFi Network 10.4.57

Improvements

• Improved backup restore resiliency.
• Improved system stability.
• Improved SSL Inspection resiliency.

Bugfixes

• Fixed an issue where a false “No DNS IP Address” message could appear on the screen in rare cases.
• Fixed an issue where loop protection didn't work correctly in rare cases.
• Fixed the security issues mentioned in Security Advisory Bulletin 066.

This is the initial release for the EF-Core.

Bundled application

• UniFi Network 10.4.57

UniFi OS 5.1.15 includes the improvements and bugfixes below.

Bundled application

• UniFi Network 10.4.57

Improvements

• Improved system stability.

Bugfixes

• Fixed an issue where DNS queries could fail over IPv6 when Content Filtering is used.
• Fixed an issue where obtaining a WAN IP could fail when receiving a malformed DHCP Option 3 on WAN.
• Fixed the security issues mentioned in Security Advisory Bulletin 065.

UniFi OS 5.1.12 includes the improvements and bugfixes below.

Bundled application

• UniFi Network 10.3.58

Improvements

• Added support for Ad Blocking and Content Filtering with Policy-Based Routing.
• Added support for IPv6 WireGuard VPN clients.
• Added support for automatic Let’s Encrypt certificates.
• Added the ability to revert applications and restore configuration backups.
• Added support for configuring FEC mode during setup on SFP28 ports.
• Allowed Super Admins to restore local backups.
• Improved the Alarm Manager user experience.
• Improved system stability.
• Improved backup restore resiliency.
• Improved IDS/IPS performance and CPU utilization.
• Improved multi-WAN failover behavior and resiliency.
• Improved VPN stability across IPsec, WireGuard, and OpenVPN.
• Improved DHCP client recovery when WAN connectivity is lost.
• Improved DNS over HTTPS (DoH) stability and configuration handling.
• Improved SFP connectivity.
• Improved WireGuard connectivity resiliency.
• Improved compatibility with ISPs that require periodic ARP on the WAN.
• Improved the app restoration experience after a firmware update.
• Improved device discovery resiliency and overall stability.
• Improved DNS cache responsiveness.
• Improved firmware upgrade behavior by updating the Network Application to the latest official release after an upgrade.

Bugfixes

• Fixed the security issues mentioned in Security Advisory Bulletin 064.
• Fixed an issue where QoS configuration was not restored after a PPP interface reconnected.
• Fixed an issue where OpenVPN client disconnection notifications could be inaccurate.
• Fixed an issue where VPN failover scenarios could leave tunnels established but traffic blackholed.
• Fixed an issue where WireGuard fallback behavior did not activate as expected.
• Fixed an issue where OpenVPN DNS query storms could occur when multiple tunnels were configured.
• Fixed various DHCP and IPv6 edge cases that could result in connectivity issues.
• Fixed excessive IGMP join and leave log entries on WAN interfaces.
• Fixed an issue where QoS CPU affinity settings were not properly restored after disabling Smart Queues.
• Fixed an issue where the ping monitor behavior was incorrect when using LAN DNS servers.
• Fixed an issue where DDNS updates could fail with Cloudflare.
• Fixed an issue where custom NTP servers could be overridden after reboot.
• Fixed an issue where PBR rules were not applied to egress traffic from NeXT AI.
• Fixed an issue where SNAT did not work properly when using NeXT AI.
• Fixed an issue where certificates were renewed daily.
• Fixed an issue where the application status could be incorrect.
• Fixed an issue where IPsec traffic could be lost.

UniFi OS 5.1.11 includes the improvements and bugfixes below.

Bundled application

• UniFi Network 10.3.58

Improvements

• Added support for Ad Blocking and Content Filtering with Policy-Based Routing.
• Added support for IPv6 WireGuard VPN clients.
• Added support for automatic Let’s Encrypt certificates.
• Added the ability to revert applications and restore configuration backups.
• Added support for configuring FEC mode during setup on SFP28 ports.
• Allowed Super Admins to restore local backups.
• Improved the Alarm Manager user experience.
• Improved system stability.
• Improved backup restore resiliency.
• Improved IDS/IPS performance and CPU utilization.
• Improved multi-WAN failover behavior and resiliency.
• Improved VPN stability across IPsec, WireGuard, and OpenVPN.
• Improved DHCP client recovery when WAN connectivity is lost.
• Improved DNS over HTTPS (DoH) stability and configuration handling.
• Improved SFP connectivity.
• Improved WireGuard connectivity resiliency.
• Improved compatibility with ISPs that require periodic ARP on the WAN.
• Improved the app restoration experience after a firmware update.
• Improved device discovery resiliency and overall stability.
• Improved DNS cache responsiveness.
• Improved firmware upgrade behavior by updating the Network Application to the latest official release after an upgrade.

Bugfixes

• Fixed an issue where QoS configuration was not restored after a PPP interface reconnected.
• Fixed an issue where OpenVPN client disconnection notifications could be inaccurate.
• Fixed an issue where VPN failover scenarios could leave tunnels established but traffic blackholed.
• Fixed an issue where WireGuard fallback behavior did not activate as expected.
• Fixed an issue where OpenVPN DNS query storms could occur when multiple tunnels were configured.
• Fixed various DHCP and IPv6 edge cases that could result in connectivity issues.
• Fixed excessive IGMP join and leave log entries on WAN interfaces.
• Fixed an issue where QoS CPU affinity settings were not properly restored after disabling Smart Queues.
• Fixed an issue where the ping monitor behavior was incorrect when using LAN DNS servers.
• Fixed an issue where DDNS updates could fail with Cloudflare.
• Fixed an issue where custom NTP servers could be overridden after reboot.
• Fixed an issue where PBR rules were not applied to egress traffic from NeXT AI.
• Fixed an issue where SNAT did not work properly when using NeXT AI.
• Fixed an issue where certificates were renewed daily.
• Fixed an issue where the application status could be incorrect.
• Fixed an issue where IPsec traffic could be lost.

Bundled application

• UniFi Network 10.0.162

Improvements

• Improved system stability.
• Improved DHCP resiliency for clients that do not comply with the RFC.

UniFi OS 5.0.12 includes the improvements listed below.

Bundled application

• UniFi Network 10.0.162

Improvements

• Added time/date mismatch toast messages.
• Improved the Internet connectivity check.
• Improved the backup and restore resiliency.
• Improved the device discovery process for faster detection.
• Improved certificate file validation.
• Improved Shadow Mode resiliency.
• Improved Web UI Stability and performance.
• Improved the Alarm Manager user experience and resiliency.
• Improved system stability.
• Improved Link Aggregation stability.
• Improved WAN throughput reporting when having more than 2 WAN interfaces.
• Improved Speed Test stability.
• Updated Traffic Identification signatures.
• [Identity] Renamed Group to Role when the console is managed by Fabric.

Bugfixes

• Fixed an issue where DNS could leak over VPN connections.
• Fixed an issue with weekday-based schedules.
• Fixed an issue where SD-WAN Spokes didn't reconnect to Hubs in rare cases when experiencing internet outages on the Hub.
• Fixed Bing search language anomalies in Deep Inspection.
• Fixed an issue where Policy-Based Routing rules were ignored for VPN Client Traffic, causing traffic to route via the wrong WAN interface.
• Fixed an issue where IPv6 addresses didn't show up for WAN interfaces.
• Fixed an STP-related network loop issue in Shadow Mode when using dual LAN switch deployments.
• Fixed an issue where a corrupted Site Magic remote peer address was not restored in Mesh deployments.
• Fixed a WireGuard site-to-site connection issue when using a specific WAN listen address.
• Fixed an OpenVPN connection resiliency issue that could cause reconnection failures during renegotiation.
• Fixed incorrect SFP voltage readings from SFP modules.
• Fixed SFP connection issues when using fixed speeds.

UniFi OS 5.0.10 includes the improvements and bugfixes listed below.

Bundled application

• UniFi Network 10.0.162

Improvements

• Added time/date mismatch toast messages.
• Improved the Internet connectivity check.
• Improved the backup and restore resiliency.
• Improved the device discovery process for faster detection.
• Improved certificate file validation.
• Improved Shadow Mode resiliency.
• Improved Web UI Stability and performance.
• Improved the Alarm Manager user experience and resiliency.
• Improved system stability.
• Improved Link Aggregation stability.
• Improved WAN throughput reporting when having more than 2 WAN interfaces.
• Updated Traffic Identification signatures.

Bugfixes

• Fixed an issue where DNS could leak over VPN connections.
• Fixed an issue with weekday-based schedules.
• Fixed an issue where SD-WAN Spokes didn't reconnect to Hubs in rare cases when experiencing internet outages on the Hub.
• Fixed Bing search language anomalies in Deep Inspection.
• Fixed an issue where Policy-Based Routing rules were ignored for VPN Client Traffic, causing traffic to route via the wrong WAN interface.
• Fixed an issue where IPv6 addresses didn't show up for WAN interfaces.
• Fixed an STP-related network loop issue in Shadow Mode when using dual LAN switch deployments.
• Fixed an issue where a corrupted Site Magic remote peer address was not restored in Mesh deployments.
• Fixed a WireGuard site-to-site connection issue when using a specific WAN listen address.
• Fixed an OpenVPN connection resiliency issue that could cause reconnection failures during renegotiation.
• Fixed incorrect SFP voltage readings from SFP modules.

UniFi OS 4.4.6 includes the improvements and bugfixes listed below.

Bundled application

• UniFi Network 9.4.19

Improvements

• Added a Block Page for Content Filtering and Ad-Blocking.
• Requires UniFi Network 9.4.11 or newer.
• Added IPv6 support for the Direct Connect feature.
• Improved DNS monitoring resiliency for WAN SLA.
• Improved single TCP connection throughput.
• Improved the Intrusion Prevention service stability under high load.
• Improved Alarm Manager.
• Improved IPsec VPN connection stability.
• Improved Remote Access connection resiliency.
• Improved storage mounting resiliency.
• Improved the setup experience for Shadow Mode.
• Improved the Shadow Mode failover time.
• Prevent transferring ownership while the device is hosting Identity Hub.

Bugfixes

• Fixed an issue where you could experience excessive logging related to MAC address scanning.
• Fixed the Traffic Activity display for clients.
• Fixed a gateway configuration issue when applying IPv6 NAT.
• Fixed false-positive alerts claiming that the DHCP pool is running out of addresses.
• Fixed an issue where Static Routes were missing after removing Shadow consoles.
• Fixed an issue where local account users did not receive email notifications.
• Fixed an issue where static routes were missing after switching the WAN type from dynamic to static.
• Fixed an issue where DDNS didn't function correctly when using dual PPPoE WAN connections.
• Fixed an issue where content filtering didn't apply to specific traffic flows.
• Fixed an issue where changing port settings could result in a gateway configuration error.
• Fixed an issue with WireGuard VPN server when using non-primary WAN interfaces.
• Fixed an issue where RADIUS authentication could fail when using anonymous identity.
• Fixed an issue where the FEC configuration on the SFP28 ports didn't take effect.

UniFi OS 4.3.6 includes Alarm Manager for Network, Cloudflare Content Filtering and improvements and bugfixes listed below.

Bundled application

• UniFi Network 9.2.87

Improvements

• Added support for CNAME DNS Records.
• Requires UniFi Network Application 9.3 or newer.
• Added support for Alarm Manager.
• Requires UniFi Network Application 9.3 or newer.
• Added support for Enhanced Content Filtering with CyberSecure.
• Requires UniFi Network Application 9.3 or newer.
• Requires an active CyberSecure subscription for granular content categories powered by Cloudflare.
• Added the ability to create a new user account while performing the ownership transfer.
• Improved the Analytics and Data Sharing user experience.
• Added the ability to completely turn off data sharing.
• Improved Flows data accuracy.
• Improved Hostname resolution.
• Improved Incoming Interface listing for Threats.
• Improved the Shadow Console resiliency.
• Improved DDNS resiliency when a non-primary WAN is used.
• Improved the Admins and Users management user experience.
• Improved Remote Access connection resiliency.
• Improved backup and restore resiliency, including better feedback when a restore fails.
• Improved storage health reporting.
• Improved port LED behavior for Shadow Mode.
• Improved Link Aggregation resiliency for ECS MC-LAG configurations.
• Updated Traffic Identification signatures.

Bugfixes

• Fixed an issue where the Release channel could change unexpectedly.
• Fixed an issue where transfer ownership could fail in rare cases.
• Fixed an issue where local users didn't receive email notifications using a custom SMTP server.
• Fixed an issue where you couldn't configure SNMP Location and Contact separately; both were required.
• Fixed an issue where users would be required to re-login every hour locally.
• Fixed an issue where the "Plug in Internet Cable" could be shown in rare cases.
• Fixed routing issues when the same subnets are configured on multiple IPsec VPNs.