I am searching for a week now what the problem could be why my firewall test failed. 8| Example: testing port 5060... full cone test failed I find out that because we use a white list (for remote locations connecting to our VPS with 3cx) the Full Cone test failed. When i open the port 5060 for the whole world the firewall test runs OK. testing port 5060... done The result of the Firewall Checker is FALLS! It should have stated, cannot verify ports with 3cx test server??? or something??? Please 3cx, :arrow: look into it!