> I have a rule in iptables to drop certain packets from addresses, like: > > iptables --list | grep 37 > DROP all -- 37.0.0.0/8 anywhere > > So I am wondering how this got through??? > > [Jan 27 02:36:52] NOTICE[9298][C-000005ce] chan_sip.c: Call from '' ( > 37.8.28.217:10024) to extension '888888011972592871997' rejected because > extension not found in context 'default' > > Shouldn't the firewall have dropped it? Without more info, no one can help. Iptables are processed top down, have you allowed something less specific above? A subnet, a protocol etc?