We have a SIP PBX behind UT and all works well. We have a rogue external IP who is trying to register on our PBX which is slowing it down.
I want to block their IP on the firewall and have set up the following rule.
Traffic Type: ANY
Source Interface: External (tried any too)
Source Address: 64.xx.xx.xxx (also tried with /32 netmask)
Source Port: any
I also tried with logging on and off. But it does not block this IP.
I have SIP bypass turned on but I also tried turning it off and it does not work either.