[Serusers] 200 OK not being ACKnowledged

Michal Matyska michal.matyska at iptel.org
Fri Aug 14 16:27:41 CEST 2009


Steven C. Blair píše v Pá 14. 08. 2009 v 09:30 -0400:
> Aug 13 13:07:24 vidar /usr/local/sbin/ser[19053]:  [SER]: --ACK--:
> Time: [Thu Aug 13 13:07:24 2009] From:
> <sip:89390 at vidar.net.isc.upenn.edu> To
> <sip:92155738396 at vidar.net.isc.upenn.edu;user=phone> Src IP
> <128.91.2.223> Method:<ACK> 

OK, ACK is received by SER... but is routed incorrectly to itself...

> Aug 13 13:07:24 vidar /usr/local/sbin/ser[19053]: [SER]: Too many
> hops 

(qualified guess... to proove it sniff traffic on loopback interface)
... so it ends it the loop, cut off by Max-Forwards limit...


> Aug 13 13:07:24 vidar /usr/local/sbin/ser[19053]: Warning:
> sl_send_reply: I won't send a reply for ACK!!

... it tries to reply 4xx Too many hops, by it's not possible for ACK.


Resume: check your SER script, how you route the 2xx ACK.

Michal




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