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

modparam("usrloc", "nat_bflag", 6) # or any other free flag ... if(lookup("location")) { if(isbflagset(6)) { # use mediaproxy if not already done # (make sure to not call it twice)

} ... }

Sergio Gutierrez wrote:

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@une.com.co mailto:sergio.gutierrez@une.com.co/ / /

On 8/8/07, *Andreas Granig* <agranig@sipwise.com mailto:agranig@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@gmail.com <mailto:saguti@gmail.com> <mailto:
saguti@gmail.com <mailto:saguti@gmail.com>>/
 >
 >
 >
 >
 >
 >
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