Unknown Caller in logs

General Help
1

Hi,

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/86.153.201.96-0000005d 5550000 “5550000” <5550000> s ANSWERED 1
12/09/2012 05:35 SIP/86.153.201.96-0000005e 5550000 “5550000” <5550000> s ANSWERED 0
12/09/2012 05:35 SIP/86.153.201.96-0000005f 5550000 “5550000” <5550000> s ANSWERED 1
12/09/2012 05:36 SIP/86.153.201.96-00000060 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
Tim

2

Well, somehow 86.153.201.96 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.

3

http://letmegooglethatforyou.com/?q=555-0000+obi110

4

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?