So, This is a major release (5.11.39) after a long time and after 5.10.27 its been packed with many new features and some of the bugs fixed.
The release note claims that there are many new features added, improvements are done and bugs fixed but we will see that as time goes and we test that.
Release notes for firmware 5.11.39: https://community.ui.com/releases/UniFi-Network-Controller-5-11-39/6ab8ef1a-376f-41e6-85b2-ceec098b8462
As of UniFi 5.9, if using Cloud access, the UniFi Network controller device requires outbound 8883/tcp to be open/unrestricted. Find up-to-date port requirements here.
The minimum supported device firmware for UAP/USW is 4.0.9, and for USG it’s 4.4.34.
(Recommended) – Create an up-to-date backup before upgrading your controller in the event any issues are encountered.
Existing UniFi controllers must be on one of the following versions in order to upgrade directly to this version:
- 5.11.38 and earlier 5.11.x versions.
- 5.10.27 and earlier 5.10.x versions.
- 5.9.33 and earlier 5.9.x versions.
- 5.8.30 and earlier 5.8.x versions.
- 5.7.28 and earlier 5.7.x versions.
- 5.6.42 and earlier 5.6.x versions.
- Most earlier versions are also supported for a direct upgrade, going back to 3.1.0.
- Java 8 must be installed on the system hosting the controller software. Java 9 and later are not yet supported.
- As of UniFi 5.9, if using Cloud access, the UniFi Network controller device requires outbound 8883/tcp to be open/unrestricted. Find up-to-date port requirements here.
- Minimum supported device firmware for UAP/USW is 4.0.9, and for USG it’s 4.4.34.
- SSH Authentication settings are now hidden behind the Advanced Features option.
Microsoft Windows specific:
- Users running 64-bit Windows should only have 64-bit Java installed. If you have 32-bit Java installed then we recommend uninstalling it.
- For Debian/Ubuntu users installing via our repo, please update your APT source (see HERE).
- Currently, they only support MongoDB 3.4. We’re working on updating support before the end of life this fall. We have instructions for Ubuntu users in our HC article HERE (see section 2.2).