Port Management Rules
I have a SIP trunk service provider and I need to setup rules for incoming calls to my PBX. In the Port Manage screen I cannot enter the IP address of my SIP service provider so that I can only allow inbound traffic to the PBX from my SIP provider. I am getting "Ghost Ringing" on my phones from hacking attempts.
Please help me add the rules to the Comcast router to stop the "Ghost Ringing".