[asterisk-users] IAX and NAT Transparency

[Gordon Henderson]

On Mon, 21 Jan 2008, bilal ghayyad wrote:

> Hi Gordon;
>
> They are able to receive calls? Origination is not a
> problem I know, but what about receiving calls from
> the Asterisk to them?
>
> For example, how I can call the extension 200 that is
> behind NAT? (Assuming that extension 200 is registered
> on the Asterisk).

You pickup another phone and dial 200.

My office phone is a SIP desk-phone (GXP 2000) which is behind a NAT 
router, and is an extension on a "virtual" PBX - a server in a co-lo 
facility. I have no problems with accepting calls on it. It uses STUN and 
there are no special rules on my NAT firewall to make it work.

On my laptop, I use an IAX softphone (IDEFISK), and its "just works" too. 
It accepts calls once it's registerd with the same server, or other 
servers, some of which are behind NAT firewalls themselves.

Gordon

>
> Regards
> Bilal
>
>
> ---------------
>
>> Hi All;
>>
>> Did anyone try to use IAX IP Phone behind NAT, and
> let
>> it receive calls from Asterisk without doing port
>> mapping at the router existed at the site where the
>> IAX IP Phone existed? Is the need just to let the
> IAX
>> IP Phone that is NATed to register on the Asterisk
> and
>> at asterisk I set nat=yes for the IAX client
>> configuration?
>
> Yes is the easy answer.
>
> I do this all the time fromn my laptop at
> friends/colleagues/other
> locations where I get a broadband connection, and
> don't ever fiddle
> with
> their routers.
>
>> Or it is impossible to let the NATed IAX to receive
>> calls without doing a port mapping at the router?
>
> Not impossible at all.
>
> You *may* find that some routers don't like it, but
> the majority of
> them
> are just fine.
>
>> What about SIP, any luck?
>
> Same again, it "just works". Not router fiddling
> required. I visit
> client
> sites with a small number of differnet SIP phones -
> plug them into
> their
> network and let them make calls, and unless they have
> weird routers
> with
> broken SIP ALGs or strict firewalling, it "just
> works".
>
> We've been through this with you recently. Are you not
> getting list
> emails?
>
> What about google or the VoIP WiKi? There is plenty of
> stuff there all
> about it. I can easilly make SIP calls from SIP phones
> behind a NAT
> router
> to an asterisk box behind a different NAT router. It
> just works and
> there
> is a good page on the VoIP WiKi all about it.
>
> Go read this:
>
>
> http://www.voip-info.org/wiki-Asterisk+SIP+NAT+solutions
>
> (Although I don't think that page is quite correct as
> I can make their
> '3'
> scenario "just work" ...)
>
> Gordon
>
>
>
>      ____________________________________________________________________________________
> Be a better friend, newshound, and
> know-it-all with Yahoo! Mobile.  Try it now.  http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ
>
>
> _______________________________________________
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-users
>