[OpenSIPS-Users] YNT: Re: YNT: Re: YNT: Re: RFC3261 transaction matching failed error for the second 401 Unauthorized - Challenging the UE

Bogdan-Andrei Iancu bogdan at opensips.org
Thu Oct 16 09:01:36 CEST 2014

Hi Kaan,

What you need to check is : do the ACK and BYE you receive in OpenSIPS 
have a Route hdr ? So, :
     check if the outbound INVITE (leaving OpenSIPS) has a Record-Route hdr
     check if the incoming 200 OK to INVITE (from UAS) has a 
Record-Route hdr
     check in inbound ACK (from UAC to OpenSIPS) has a Route hdr.

Let me know.


Bogdan-Andrei Iancu
OpenSIPS Founder and Developer

On 16.10.2014 00:25, Kaan Dandin wrote:
> Hi Bogdan,
> Thanks for your response. I have check the related documentation once 
> more.
> But it in fact, I was already using record_route and loose_route.
> When I receive initial INVITE I use record_route.
> When the following messages has to_tag , I am checking with 
> loose_route and making the routing with t_relay.
> This is working properly for the messages before ACK and BYE.
> But for ACK and  BYE messages it is not able to find route and  making 
> a DNS lookup  and since
> pcscf.open-ims.test is configured as , it is always going 
> to .5 openims node.
> The difference between 180 Ringing , 200 OK which is passed properly 
> and ACK and BYE messages seems Via headers. 180 Ringing has all the 
> via headers.
> related part of script for record_route()

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