[SR-Users] TM: t_relay([host, port]) DNS Queries

Carsten Bock carsten at ng-voice.com
Wed Jul 27 17:21:39 CEST 2016


Hi,

can you run kamcmd dns.view? There you should see, what records are cached
and when they will be refreshed.

Thanks,
Carsten



2016-07-27 17:04 GMT+02:00 Louis-Olivier Roof <lroof at jive.com>:

> Thanks for your prompt answer Carsten,
>
> According to the docs, the cache should be periodically invalidated
> according to the replies TTL (bounded by config values).
>
> So leaving the cache ON should be OK and still produce DNS queries,
> which is not what I'm seeing.
>
> Am I misunderstanding something?
>
> Thanks!
>
> Louis-Olivier
>
> On 2016-07-27 10:51 AM, Carsten Bock wrote:
> > Hi Louis-Olivier,
> >
> > you should look at the DNS-Parameters of the Core:
> > http://www.kamailio.org/wiki/cookbooks/devel/core#dns_parameters
> >
> > Kamailio caches DNS results by default (which can be turned off).
> >
> > Thanks,
> > Carsten
> >
> > 2016-07-27 16:47 GMT+02:00 Louis-Olivier Roof <lroof at jive.com
> > <mailto:lroof at jive.com>>:
> >
> >     Dear Kamailio users,
> >
> >     Ref:
> http://kamailio.org/docs/modules/4.2.x/modules/tm.html#tm.f.t_relay
> >
> >     Using t_relay([host, port]) to relay messages to a specific host does
> >     not seem to generate DNS queries to the said host after Kamailio has
> >     initially processed the configuration file.
> >
> >     It resolves the host once at startup then continues using the same
> >     IP after.
> >
> >     Is that expected behavior? Anyone has had this issue before and
> found a
> >     way to work around it?
> >
> >     Note that for this specific application, messages need to be relayed
> to
> >     a specified host (different from current R-URI) and this host needs
> to
> >     be resolved by DNS during normal operation, not only at startup.
> >
> >     Thanks!
> >
> >     Louis-Olivier
> >
> >     _______________________________________________
> >     SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing
> list
> >     sr-users at lists.sip-router.org <mailto:sr-users at lists.sip-router.org>
> >     http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
> >
> >
> >
> >
> > --
> > Carsten Bock
> > CEO (Geschäftsführer)
> >
> > ng-voice GmbH
> > Millerntorplatz 1
> > 20359 Hamburg / Germany
> >
> > http://www.ng-voice.com
> > mailto:carsten at ng-voice.com <mailto:carsten at ng-voice.com>
> >
> > Office +49 40 5247593-40
> > Fax +49 40 5247593-99
> >
> > Sitz der Gesellschaft: Hamburg
> > Registergericht: Amtsgericht Hamburg, HRB 120189
> > Geschäftsführer: Carsten Bock
> > Ust-ID: DE279344284
> >
> > Hier finden Sie unsere handelsrechtlichen Pflichtangaben:
> > http://www.ng-voice.com/imprint/
> >
> >
> > _______________________________________________
> > SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
> > sr-users at lists.sip-router.org
> > http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
> >
>
> _______________________________________________
> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
> sr-users at lists.sip-router.org
> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>



-- 
Carsten Bock
CEO (Geschäftsführer)

ng-voice GmbH
Millerntorplatz 1
20359 Hamburg / Germany

http://www.ng-voice.com
mailto:carsten at ng-voice.com

Office +49 40 5247593-40
Fax +49 40 5247593-99

Sitz der Gesellschaft: Hamburg
Registergericht: Amtsgericht Hamburg, HRB 120189
Geschäftsführer: Carsten Bock
Ust-ID: DE279344284

Hier finden Sie unsere handelsrechtlichen Pflichtangaben:
http://www.ng-voice.com/imprint/
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