[OpenSIPS-Users] nat_traversal nat_keepalive vs. fix_contact

[Dan Pascu]

On 29 Sep 2010, at 05:37, Jody Rudolph wrote:

> All,
>
>
> Is there any reason that nat_keepalive and fix_contact should not be  
> used on the same register message? When both are used as shown  
> below, the keep-alives are not sent. If the fix_contact is commented  
> out the keep-alives are sent, however, the RFC1918 contact is sent  
> to the registrar.

You should not fix the contact for REGISTER messages. The whole system  
not only works just fine without it, it is required by the RFC that  
the contact is not modified.
I can't recall right now why it behaves like you describe, but I'd  
venture to guess that since you fixed the contact and it was saved  
with a public IP, the keepalive system ignores it, considering that it  
doesn't need keepalives anymore.

> 	
> 	if (client_nat_test("3")) {
>
>
>           	nat_keepalive();
> 		add_path();
> 		ds_select_dst("1", "4");
> 		#fix_contact();   <------------if uncommented the keep-alives are  
> not sent
> 		if (!t_relay()) {
> 			sl_reply_error();
> 		};
> 		exit;
> 	}
>
>
> Thanks,
> Jody Rudolph
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>


--
Dan