[OpenSIPS-Users] Is fix_nated_contact() useful when proxy and callee is behind NAT?

[Bogdan-Andrei Iancu]

Hi Rodrigo,

If opensips is behind NAT, you should not use the nat related modules 
(as the incoming traffic is correct from nat perspective, as originating 
from public network). What you need to do is to be sure the traffic sent 
out by opensips has the public IP and not the local private one. For 
this, look at :
     advertise_address
     advertise_port
(http://www.opensips.org/Documentation/Script-CoreParameters-2-1#toc25)

And be sure you have do port fwd of the SIP port from the public address 
of the NAT to the private IP of your opensips.

Regards,

Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com

On 07.01.2016 13:30, Rodrigo Pimenta Carvalho wrote:
>
> Hi.
>
>
> I have read the entire OpenSIPS' documentation about how to deal with 
> NATs.
>
> I found ways of dealing with messages from client that is behind NAT. 
> OpenSIPS can fix Contact headers fields and registers, when SIP 
> messages comes from clients and cross NATs before reaching this proxy.
>
>
> However, my OpenSIPS and callee is behind NAT, not the client. That 
> is, if a client (caller) calls the callee, how could OpenSIPS with its 
> functions fixes Contact header fields in responses that go from callee 
> to caller, so that the client will be able to send ACKs? It is still 
> obscure to me.
>
>
> Any idea?
>
>
> Best regards.
>
>
> RODRIGO PIMENTA CARVALHO
> Inatel Competence Center
> Software
> Ph: +55 35 3471 9200 RAMAL 979
>
>
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> Users at lists.opensips.org
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