[OpenSIPS-Users] Problem proxying a SIP connection with t_relay

[johan]

++ John.

On 12/10/2022 18:29, John Quick wrote:
> Thomas,
>
> The UAS at 10.30.9.11 has failed to process the two Record-Route headers
> sent in the INVITE. It should send the Route Set back as part of the
> Response - i.e. within the 200 OK. But it hasn't. It has just absorbed the
> Record-Route headers and ignored them. I would say that is faulty UAS
> behaviour, but maybe Bogdan could confirm.
>
> Consequently, the ACK has no Route headers. That means OpenSIPS is treated
> as the final destination - it doesn't know that it is meant to relay the ACK
> to 10.30.9.11
>
> If you can't fix the UAS, you could try using the Topology hiding module in
> OpenSIPS. That would probably overcome the problem because Topology hiding
> doesn't send Record-Route headers downstream.
>
> John Quick
> Smartvox Limited
> Web: www.smartvox.co.uk
>
>
>
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