[OpenSIPS-Users] Issues with ACK with 2 NIC opensips + GW behind NAT

[oso che bol]

Dear IBC,

with the bug "No Route" in 200 sent by GW, there are any workaround on
opensips to fix that? We could force ACK go through opensips?

Thanks,
-LN

On Mon, May 4, 2009 at 6:19 PM, Iñaki Baz Castillo <ibc at aliax.net> wrote:

> 2009/5/4 oso che bol <ndlgroup1 at gmail.com>:
> > Hi IBC, bogdan,
> >
> > I capture on UA 1 (caller)
> > 1. Invite from caller send to opensips
> > 2. opensips send to caller 100 Give a try
> > 3. Opensips send 200 OK with SDP to Caller
> > 4. RTP setup between Caller and RTPPRoxy
> > 5. Caller send ACK to SIP_GW_PRIVATE_IP (that break here )
> >
> > Could you please explain why ACK do not go through Opensips?
> > Thanks,
>
> First of all, I don't see the 200 arriving to caller in the SIP flow
> you pasted (probably because you just did the capture for one
> interface).
>
> Anyway I see a *bug* in the 200 sent by the GW: It doesn't contain
> "Route" header !!!
> It should include it since the INVITE arriving to it did contain
> "Record-Route".
>
> So, the 200 arrives to the caller with NO "Route" headers and the
> following Contact:
>   Contact: sip:SIPGW_PRIVATE_IP.
>
> So, the caller would sent the ACK *directly* to SIPGW_PRIVATE_IP, and
> of course, it's unreachable from its LAN.
>
> The problem is in the GW which doesn't add "Route" header to the 200.
> This "Route" should mirror the value of the received "Record-Route"
> headers in the first INVITE.
>
> PD:  Please, *don't* add Bogdan in the CC of all your mails, he *does*
> read this maillist. Just add the maillist as recipient of your
> questions.
>
> Regards.
>
>
> --
> Iñaki Baz Castillo
> <ibc at aliax.net>
>
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>
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