I've just put 'fail2ban' on my asterisk box and it has cleared a constant stream of registration attempts, but this keeps coming up:
== Using SIP RTP CoS mark 5
[2013-12-05 17:05:54] NOTICE: chan_sip.c:22622 handle_request_invite: Call from '' (188.8.131.52:5076) to extension '+448458673552' rejected because extension not found in context 'CallsComingIn'.
I'm trying to work out what's happening.
The context 'CallsComingIn' is in the [general] section of sip.conf. There is no registration attempt, so is it a sip invite coming straight into port 5060 trying to dial an extension '+448458673552' and asterisk uses the 'CallsComingIn' context but can't match the extension?