[OpenSER-Users] Issue calling use_media_proxy() at on_reply_route.

[Sergio Gutierrez]

Hi Andreas.

Thanks for your answer. I that case, as you say, how should I setup the
configuration?

After doing lookup("location"), how could I check nat-flag?

Thanks a lot.
*
Sergio Armando Gutiérrez Betancur*
*S**ubdirección **A**plicaciones **de **S**ervicios **C**onvergentes**
EPM TUNE *
*Tel: 054 3802956*
*Email: sergio.gutierrez at une.com.co*
*
*

On 8/8/07, Andreas Granig <agranig at sipwise.com> wrote:
>
> Hi,
>
> Maybe the request of this reply hasn't been passed to mediaproxy? If the
> callee is registered from behind NAT, you know that already in the
> request because the nat-flag should have been set during registration.
> So after lookup("location") the nat-flag should be set, and if so, you
> have to use_media_proxy() also for the request.
>
> Andreas
>
> Sergio Gutierrez wrote:
> > Hello all.
> >
> > We are facing some problems in our deployment of OpenSER, related to NAT
> > Traversal solution using MediaProxy.
> >
> > In our scenario, using the the sample configuration NAT detection works
> > right for REGISTER method, and for INVITE's sent from clients behind
> > NAT, but, incoming calls originated from transparent clients, directed
> > to clients behind NAT do not work, and do not pass through MediaProxy.
> > Services based on re-INVITES do not work either.
> >
> > To solve that issue, we tried to intercept the 200 OK answer coming from
> > NAT client, so that we could call use_media_proxy(), but, we get the
> > error: "Empty Response from media_proxy()"
> >
> > Our configuration is more or less like this:
> >
> > # In the beginning of the main route
> >
> > if(client_nat_test("7"))
> > {
> >    setflag(2);
> >    fix_contact();
> > };
> >
> > .....
> >
> > if(is_method("INVITE"))
> > {
> >     if(isflagset(2))
> >     {
> >         use_media_proxy();
> >     };
> >
> >     t_on_reply("1");
> >
> > }
> >
> > ....
> >
> > on_reply_route[1]
> > {
> >         if (status =~ "(18[0-3])|(2[0-9][0-9])|(1[0-9][0-9])")
> >         {
> >                 if (client_nat_test("3"))
> >                 {
> >                         fix_contact();
> >                         use_media_proxy();
> >                 }
> >
> >         }
> > }
> >
> >
> > That is a very brief configuration fragment, but it is more or less the
> > schema of configuration we are using. So far, our solution to be able to
> > have the whole services working is marking all the calls so that they
> > pass through the mediaproxy, but we are not sure if that is a good
> > solution.
> >
> > Thanks in advance for every hint or suggestion.
> >
> > Kind regards
> >
> > /Sergio Armando Gutiérrez Betancur/
> > /S//ubdirección //A//plicaciones //de //S//ervicios //C//onvergentes//
> > UNE - EPM Telecomunicaciones
> > / /Tel: 054 3802956/
> > /Email: saguti at gmail.com <mailto:saguti at gmail.com>/
> >
> >
> >
> >
> >
> > ------------------------------------------------------------------------
> >
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> > Users mailing list
> > Users at openser.org
> > http://openser.org/cgi-bin/mailman/listinfo/users
>
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