[Freeswitch-users] Banning IP address that attempt registration via IP

Hey everyone! So I have quite a few "security" features installed on the server, including custom IP banning methods using IP Tables, (fail2ban caused too many issues). All endpoints on our system register via a domain, I'm looking for suggestions on how to block IP addresses that attempt to register with the IP address only. In other words, every time the warning below is received I'd like to ban that particular IP or at least add it to a list somewhere. WARNING: "You must define a domain called 'XXX.XXX.XX.XXX' in your directory and add a user with the id" I'm thinking of a custom script that scans the logs (which logs?) Any advice is appreciated. Thanks!