Hi Antonioss,
See the "advertise" option - there is a global one, or a per-socket on:
https://www.opensips.org/Documentation/Script-CoreParameters-3-5#advertised_address
https://www.opensips.org/Documentation/Script-CoreParameters-3-5#socket
(the AS option)
Regards,
Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
https://www.opensips-solutions.com
https://www.siphub.com
On 02.04.2025 15:00, Antonios Psaras wrote:
Hello Johan
Thank you for your prompt reply.
My question is how do I force opensips not to use NAT IP which is
defined on socket level?
As you mention rtpengine as well, what flags should I pass in order
not to use the NAT IP which is also defined as configuration on
“external” interface.
Thank you once more for your support.
*Antonis Psaras*
*From:* Johan De Clercq <[email protected]>
*Sent:* Τετάρτη, 2 Απριλίου 2025 13:23
*To:* [email protected]; OpenSIPS users mailling list
<[email protected]>
*Subject:* Re: [OpenSIPS-Users] mhomed OpenSIPs behind NAT - How to
control NAT IP
Antonias,
yes you can. You need to if then else the stuff. if $si==1.2.34 then
use nat
else don't use nat.
Note, not only for opensips headers, but you will also need different
flags for rtpengine.
Op wo 2 apr 2025 om 11:35 schreef Antonios Psaras <[email protected]>:
Dear all.
I have the following setup.
OpenSIPs Server has two interfaces (DMZ / LAN). DMZ is behind NAT.
RTP Engines is also configured.
Everything was fine until an end point with in DMZ asked for SIP
Trunking. The issue here is that if DMZ Client tries to connect to
OpenSIPs DMZ interface, OpenSIPs will reply with NAT IP on SIP
body as well as NAT IP on SDP.
My thought is to create an other socket on DMZ interface with a
different port without NAT configuration and ask the DMZ Client to
connect on that interface. That will required extra configuration
per peer as I will need to specify the preferred communication
socket ie on load balancing configuration. Moreover I should
configure a new RTPEngine Service without NAT configuration and
route those calls to that one.
Most probably the above scenario will work but I am looking for
any alternatives to minimize configuration and complexity.
Is there any way to control the usage of NAT IP on OpenSIPs
script. Ie if source IP is with in DMZ do not send NAT IP in SIP
Headers.
Regards
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