Sip registrering

We have in the firewall on asterisk completely blacklisted an ip address, but we still succeeded in registering our sip account from this ip address.

Has any of you experienced this and/or have an idea why?

In a user/peer definition in sip.conf, you may limit SIP traffic to and from this peer to a certain IP or network using :

contactdeny=0.0.0.0/0.0.0.0 ; Use contactpermit and contactdeny to
contactpermit=172.16.0.0/255.255.0.0 ; restrict at what IPs your users may

Why don’t you just set up iptables properly?