UniFi - Change Default Ports for Controller and UAPs

Default Ports

By default, the UniFi controller will operate on the following ports:

  • unifi.http.port=8080 (port for UAP to inform controller)
  • unifi.https.port=8443 (port for controller GUI / API, as seen in web browser)
  • portal.http.port=8880 (port for HTTP portal redirect)
  • portal.https.port=8843 (port for HTTPS portal redirect)
  • unifi.db.port=27117 (local-bound port for DB server)

Note: In version 4.5.2 and later, users can also define the port assigned to STUN services, for scenarios where two or more separate UniFi instances are desired on the same controller machine.

  • unifi.stun.port=3478 # UDP port used for STUN

Note: Since v3.2.9+ and v4.6.0+, two more ports are being reserved for device redirector. There is no need to open firewall for these ports on controller, however, on controller, avoid to use these ports.

  • port 8881 for redirector port for wireless clients
  • port 8882 for redirector port for wired clients

Changing the Ports

UniFi gives operators the freedom to change these ports from their default assignments. By using a network utility (netstat, etc.), users can determine which ports are in use/opened/closed. The steps are outlined below:

  1. Close any instances of UniFi software running on controller(s)
  2. Modify the file system.properties accordingly—the file can be found in the directory <unifi_base>/data/system.properties
  3. Make sure all ports needed by UniFi are available
  4. Restart UniFi

IMPORTANT: Make sure not to place any spaces, comments, or other characters after any of the custom lines as the controller will ignore your customizations if you do so.


Example (Windows)

  1. Run “netstat – ano” command in the command line.
  2. Locate the PID for the mentioned port in use.
  3.  Open task manager and select view and select columns , put a check for PID (process identifiers)
  4. Check the process corresponding to the PID located for the port during step 2.
  5. End the process if it is possible.
  6. If not possible go on the location <unifi_base>/data and open the system file with word or notepad.
  7. Modify this file to change the port that was in use.  For example if port 8081 was in use you would modify the line "unifi.shutdown.port=8081" to something like "unifi.shutdown.port=8089" assuming port 8089 was not already in use.

NOTE: In the event that the controller software has either never run on the system, or can't run because of a port conflict, then either the controller software (assuming no existing port conflict) or the UniFi Discovery utility, needs to be run (which will also generate the system.properties file.)

Windows or Mac will have an icon for the discovery utility but Linux will not. Users on Linux will have to load it via CLI: java -jar /usr/lib/unifi/lib/ace.jar discover

Video tutorial

Note: The following video is based on v2.x, however, the system.properties file still rests in the same directory "<unifi_base>/data/system.properties"  in v3 and v4.