sip alg detected full cone test failed

  1. Firewall errors after install of V20

    Hi all, I just did the upgrade from V18 to V20. After doing this, the system appears to be working but when I run the firewall check, I get the following errors. Everything was working successfully on V18. Not sure if this makes a difference but when I did the install, I forgot to change the...
  2. Fred-E

    Detecting SIP ALG... failed and the Port 9000 full cone test Failed

    3CX Version: 18.0 Server OS: Debian 3CX hosted on Windows server 2016 Hyper-V on premise Has the Firewall Checker passed: No I am trying to figure out this issue since 2 weeks and got some ideas about the problem. First of all I have configured the firewall of the router more than 5 times and I...
  3. SIP ALG dectection failed, single port 9000 full cone test failed

    I have installed 3CX on to multiple Windows 2016 Servers all behind a sonicwall but they all failed on detecting SIP ALG, and testing port 9000 full cone test failed, although all other ports pass. I have followed the 3CX sonicwall guides to the letter, I have modified them to suggestions made...