*> you can set only one contact address*

Recent versions of Kamailio support setting Contact address per uac record, see *contact_addr* field.

Regards,

On Wed, Feb 9, 2022 at 11:15 AM Tihomir Culjaga tculjaga@gmail.com wrote:

Hi all

I'm wondering what is best practice to configure kamailio for a setup shown below. Carriers only support interconnection over a private network so I need to terminate every separate network on kamailio machine (and on RTPEngine) . That will turn very quickly into an administration nightmare as we add more and more carriers. My plan is to terminate carrier private networks on a router and NAT the traffic to kamailio where it leads me to a kamailio behind NAT setup. Well, in theory set_advertised_address and set_advertised_port per message can do the trick... at least I hope. Also, some carriers require a SIP registration to activate SIP trunks. I do that using UAC module (remote registration) but here again I got a problem with contact address as you can set only one contact address (modparam("uac", "reg_contact_addr", "10.1.1.11:5060")).

                /--RTP 10000-19999-- RTPEngine1 -----RTP------+--

IPPBX1 carrier1 --- NAT ---| | | | | | carrier2 --- NAT ---+-----SIP 5060------ kamailio ----SIP---- Dispatcher | | | carrier3 --- NAT ---| | | --RTP 20000-29999-- RTPEngine2 -----RTP------+-- IPPBX2

So bottom line, I'm wondering what would be the best practice for such a scenario ? That would spare me from hitting many pitfalls.

Would really appreciate a hint.

Regards, Tihomir.

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I prefer to use two NIC 1) with public IP; 2) with private IP.

Both NICs use routers as a gateway. On Linux need to configure policy routing.

Probably you may want to use topos or topoh modules.

On Wed, Feb 9, 2022 at 7:14 PM Tihomir Culjaga tculjaga@gmail.com wrote:

Hi all

I'm wondering what is best practice to configure kamailio for a setup shown below. Carriers only support interconnection over a private network so I need to terminate every separate network on kamailio machine (and on RTPEngine) . That will turn very quickly into an administration nightmare as we add more and more carriers. My plan is to terminate carrier private networks on a router and NAT the traffic to kamailio where it leads me to a kamailio behind NAT setup. Well, in theory set_advertised_address and set_advertised_port per message can do the trick... at least I hope. Also, some carriers require a SIP registration to activate SIP trunks. I do that using UAC module (remote registration) but here again I got a problem with contact address as you can set only one contact address (modparam("uac", "reg_contact_addr", "10.1.1.11:5060")).

                /--RTP 10000-19999-- RTPEngine1 -----RTP------+--

IPPBX1 carrier1 --- NAT ---| | | | | | carrier2 --- NAT ---+-----SIP 5060------ kamailio ----SIP---- Dispatcher | | | carrier3 --- NAT ---| | | --RTP 20000-29999-- RTPEngine2 -----RTP------+-- IPPBX2

So bottom line, I'm wondering what would be the best practice for such a scenario ? That would spare me from hitting many pitfalls.

Would really appreciate a hint.

Regards, Tihomir.

---

Kamailio - Users Mailing List - Non Commercial Discussions

• sr-users@lists.kamailio.org

Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:

• https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users