[asterisk-users] Routers that do not show external IPs...

Leif Madsen leif.madsen at asteriskdocs.org
Thu Oct 14 11:26:28 CDT 2010

On 10-10-14 12:18 PM, Carlos Chavez wrote:
> 	I have a customer that has a Trendnet TEW-435BRM router which has the
> bad habit of rewriting all external connections so the Asterisk server
> only sees the IP address of the router itself.  Up to today this has not
> been a problem since all extensions are on the local network but now
> they want to have a couple external IP phones (SIP).
> 	I opened up the ports on the router and my phone can register.  The
> problem is that I have no audio because Asterisk thinks that the phone
> is on the internal network and does not use the NAT and externip
> settings.  How do you deal with this kind of router so you can have
> external phones?

Typically that is an option you can turn off. It is meant to help with SIP 
translations and such through the router, but as you're finding out, they 
typically just get in the way.

Check through the web interface/configuration and see if there is anything about 
VoIP or SIP support in the router, and disable it.


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