[pjsip] Seeing alot of weird attack attempts

Markus Kovanen markus.kovanen at nettitieto.fi
Thu Oct 1 04:15:32 EDT 2015


Could anyone give me some specifics why i am seeing a lot of these kind 
of attack attemps on my asterisk log and what kind of attack this is? 
Should i be worried?

-- end of packet.
[2015-10-01 02:27:53] ERROR[2562] pjsip:     sip_transport. Error 
processing 429 bytes packet from UDP : PJSIP syntax 
error exception when parsing 'Co
ntact' header on line 4 col 11:
REGISTER sip:xxx.xxx.xxx.xxx:5060 SIP/2.0
Via: SIP/2.0/UDP;branch=z9hG4bK610f49168c4f609be09b7cdba3060815eb0bb516e23d1a0d3165409d761b78
Call-id: 206dbbcc476ab1413b663659b5e63d00
Contact: *C*# <sip:*C*#@>
Expires: 1800
From: *C*# 
Max-forwards: 70
To: *C*# <sip:*C*#@xxx.xxx.xxx.xxx:5060>
Content-length: 0

-Markus Kovanen

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