Unknown Caller in logs


Coule someone help me with this, I am new to FreePbx and just trying to setup a system now. I have a Obi110 working as a trunk to the landline here, and an account with sipgate.co.uk.

Last night these appeared in the log:
12/09/2012 05:35 SIP/ 5550000 “5550000” <5550000> s ANSWERED 1
12/09/2012 05:35 SIP/ 5550000 “5550000” <5550000> s ANSWERED 0
12/09/2012 05:35 SIP/ 5550000 “5550000” <5550000> s ANSWERED 1
12/09/2012 05:36 SIP/ 5550000 “5550000” <5550000> s ANSWERED 1

I don’t know how they got there, or what they are. There is no record of it in the Obi110 call history, so I assume someone has connected from remote, but this asterisk server is sat behind a NAT router, with no ports forwarded to it, so it shouldn’t be accessible from remote.

Could anyone help explain what they are, and how it had connected?

Many Thanks

Well, somehow has a route to the box. I would check your network security.

Remember basic networking, make sure you only have one route and then focus on that device.


I have read that already tadpole, but thanks for the link. I don’t think it is coming through the Obi110, as calls from the Obi have the Source Channel of: SIP/Obi110…, and these calls don’t appear in the Obi’s call history, so I assume they have somehow gone direct to the Asterisk box.

This is the same thing: http://forums.digium.com/viewtopic.php?p=169494

I feel like I am missing something obvious, could it be possible that the router can open a port to the Asterisk box and allow an incoming connection? I always thought you had to specifically forward a port for anyone to connect from remote.

For this to appear in the call logs would it have to come in to port 5060 on the asterisk box?