I have an issue here with a Cisco SRP541, i know this is vendor specific but i'm taking my chances, maybe someone dealt with it before.
I have port forwarding sending traffic on tcp 5060 to my internal digital pbx. I'm getting bombarded with tons of unauthorized sip registration attempts, I created a rule to deny all access from that source IP and IP subnet but still the registrations go through. Is it that port forwarding takes precedence over Firewall rules? I can't specify a source in port forwarding so how do I stop it?