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 <jo...@democon.be>
Sent: Τετάρτη, 2 Απριλίου 2025 13:23
To: apsa...@microbase.gr; OpenSIPS users mailling list
<users@lists.opensips.org>
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 <apsa...@microbase.gr
<mailto:apsa...@microbase.gr> >:
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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