This guide was created for the SonicWall TZ-SOHO router with Firmware Version 22.214.171.124-14n. This has the newer GUI version and looks quite a bit different than the GUI that had been used in previous years. FusionPBX is in the cloud with a public IP, and the TZ-SOHO router is at the customer’s location with the extensions behind it.
How to Disable SIP ALG
- Log into the router
- Click the MANAGE tab at the top
- On the left menu, go to System Setup-> VOIP
- Check the “Enable consistent NAT” box
- Uncheck the “Enable SIP Transformations” box
- Click ACCEPT