Asterisk flooded by incoming SIP connection from unknown peer

asterisknowfreepbx

Hello i just installed an new asterisk configuration with freepbx and signed for a SIP account.

I setup the SIP trunk with my provider data, launched the console with the asterisk -vvvr command to debug then i noticed that the logs are flooded by entries like this:

== Using SIP RTP CoS mark 5
-- Executing [00088884600972595117946@from-sip-external:1] NoOp("SIP/XXX.XXX.58.107-00000355", "Received incoming SIP connection from unknown peer to 00088884600972595117946") in new stack
-- Executing [00088884600972595117946@from-sip-external:2] Set("SIP/XXX.XXX.58.107-00000355", "DID=00088884600972595117946") in new stack
-- Executing [00088884600972595117946@from-sip-external:3] Goto("SIP/XXX.XXX.58.107-00000355", "s,1") in new stack
-- Goto (from-sip-external,s,1)
-- Executing [s@from-sip-external:1] GotoIf("SIP/XXX.XXX.58.107-00000355", "1?checklang:noanonymous") in new stack
-- Goto (from-sip-external,s,2)
-- Executing [s@from-sip-external:2] GotoIf("SIP/XXX.XXX.58.107-00000355", "0?setlanguage:from-trunk,00088884600972595117946,1") in new stack
-- Goto (from-trunk,00088884600972595117946,1)
-- Executing [00088884600972595117946@from-trunk:1] Set("SIP/XXX.XXX.58.107-00000355", "__FROM_DID=00088884600972595117946") in new stack
-- Executing [00088884600972595117946@from-trunk:2] NoOp("SIP/XXX.XXX.58.107-00000355", "Received an unknown call with DID set to 00088884600972595117946") in new stack
-- Executing [00088884600972595117946@from-trunk:3] Goto("SIP/XXX.XXX.58.107-00000355", "s,a2") in new stack
-- Goto (from-trunk,s,2)
-- Executing [s@from-trunk:2] Answer("SIP/XXX.XXX.58.107-00000355", "") in new stack
-- <SIP/XXX.XXX.58.107-00000352> Playing 'digits/8.ulaw' (language 'en')
-- <SIP/XXX.XXX.58.107-00000351> Playing 'digits/9.ulaw' (language 'en')
-- <SIP/XXX.XXX.58.107-0000034f> Playing 'digits/6.ulaw' (language 'en')
-- Executing [s@from-trunk:5] SayAlpha("SIP/XXX.XXX.58.107-00000353", "00088884400972595117946") in new stack
-- <SIP/XXX.XXX.58.107-00000353> Playing 'digits/0.ulaw' (language 'en')
-- Executing [s@from-trunk:3] Wait("SIP/XXX.XXX.58.107-00000355", "2") in new stack
-- <SIP/XXX.XXX.58.107-00000350> Playing 'digits/1.ulaw' (language 'en')
-- <SIP/XXX.XXX.58.107-00000352> Playing 'digits/8.ulaw' (language 'en')
-- Executing [s@from-trunk:6] Hangup("SIP/XXX.XXX.58.107-0000034f", "") in new stack
== Spawn extension (from-trunk, s, 6) exited non-zero on 'SIP/XXX.XXX.58.107-0000034f'
-- Executing [h@from-trunk:1] Macro("SIP/XXX.XXX.58.107-0000034f", "hangupcall,") in new stack
-- Executing [s@macro-hangupcall:1] GotoIf("SIP/XXX.XXX.58.107-0000034f", "1?theend") in new stack
-- Goto (macro-hangupcall,s,3)
-- Executing [s@macro-hangupcall:3] ExecIf("SIP/XXX.XXX.58.107-0000034f", "0?Set(CDR(recordingfile)=)") in new stack
-- Executing [s@macro-hangupcall:4] Hangup("SIP/XXX.XXX.58.107-0000034f", "") in new stack
== Spawn extension (macro-hangupcall, s, 4) exited non-zero on 'SIP/XXX.XXX.58.107-0000034f' in macro 'hangupcall'
== Spawn extension (from-trunk, h, 1) exited non-zero on 'SIP/XXX.XXX.58.107-0000034f'
-- <SIP/XXX.XXX.58.107-00000351> Playing 'digits/7.ulaw' (language 'en')
-- <SIP/XXX.XXX.58.107-00000350> Playing 'digits/1.ulaw' (language 'en')
-- <SIP/XXX.XXX.58.107-00000353> Playing 'digits/0.ulaw' (language 'en')
-- <SIP/XXX.XXX.58.107-00000352> Playing 'digits/4.ulaw' (language 'en')

I just can't debug my trunk because of thoses pesky connections from unknown peers, what are these calls, how can i track their origins, could it be a malfunctioning test tool from my provider?

Best Answer

Even with GUEST turned off, your Asterisk server is still going to be hit with SIP hacking attempts. You should install something more to monitor and manage the attacks. Have a look at Asterisk Security for suggestions and even the basics of how to secure your Asterisk server. (Guest off is NOT enough)

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