[asterisk-users] Receive Call from unknown user

[Malvin Rito]

Hello List,

I have noticed for the past few weeks that someone from an unknown IP is
trying to make a call to my Asterisk box, below is the sample content of the
log file. Sometimes the calls are being made every seconds.

Is my system being hack by someone?

Oct 12 09:41:47] VERBOSE[3114] netsock.c: == Using SIP VRTP CoS mark 6
[Oct 12 09:41:47] VERBOSE[21627] pbx.c: -- Executing
[99541442073479999 at from-sip-external:1] NoOp("SIP/113.105.153.251-00000265",
"Received incoming SIP connection from unknown peer to 99541442073479999")
in new stack
[Oct 12 09:41:47] VERBOSE[21627] pbx.c: -- Executing
[99541442073479999 at from-sip-external:2] Set("SIP/113.105.153.251-00000265",
"DID=99541442073479999") in new stack
[Oct 12 09:41:47] VERBOSE[21627] pbx.c: -- Executing
[99541442073479999 at from-sip-external:3] Goto("SIP/113.105.153.251-00000265",
"s,1") in new stack
[Oct 12 09:41:47] VERBOSE[21627] pbx.c: -- Goto (from-sip-external,s,1)
[Oct 12 09:41:47] VERBOSE[21627] pbx.c: -- Executing [s at from-sip-external:1]
GotoIf("SIP/113.105.153.251-00000265", "0?checklang:noanonymous") in new
stack
[Oct 12 09:41:47] VERBOSE[21627] pbx.c: -- Goto (from-sip-external,s,5)
[Oct 12 09:41:47] VERBOSE[21627] pbx.c: -- Executing [s at from-sip-external:5]
Set("SIP/113.105.153.251-00000265", "TIMEOUT(absolute)=15") in new stack
[Oct 12 09:41:47] VERBOSE[21627] func_timeout.c: Channel will hangup at
2010-10-12 09:42:02.042 PHT.
[Oct 12 09:41:47] VERBOSE[21627] pbx.c: -- Executing [s at from-sip-external:6]
Answer("SIP/113.105.153.251-00000265", "") in new stack

Please Advise.

Malvin