Need to disable SIP ALG so that your VOIP telephones in the office work properly?
In your Unifi Controller or Cloud Key browse to ‘Routing & Firewall’ -> ‘Firewall’ -> ‘Settings’.
Switch off the H.323 and SIP Conntrack modules and Save the Settings.
![](https://technet.fourit.nl/wp-content/uploads/2019/11/USG-Disable-SIP-ALG-1024x558.jpg)
If you don’t have these options on your controller please backup your configuration and upgrade to the latest version.