GXW4108 PSTN Gateway - Only Outbound calls working

Looks like, insecure=port,invite was the trick.

Waiting a few seconds is no a big deal. Looks like after the first ring it shows up on the VoIP Phones.

Would it be recommended to change 5160 to a more random port?

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If it’s not open to the internet or only open from trusted addresses, no problem.

If you will need remote extensions on dynamic addresses and VPN is unsuitable, then using a random port will greatly reduce the number of attacks from malicious scanners. However, you should still have strong passwords and a system such as fail2ban that will block attackers from beating on your system.

If you will be using pjsip for remote extensions, you should choose a random port for it, too.

Yeah I have fail2ban setup along with Guest SIP Calls disabled. I have the NIC that’s connected to the internet with the Firewall Rule for Internet.

Which port setting would I change? Listen and/or Bind?
Would this effect currently setup phones?

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