Guys
For standard H.323 equipment all that is needed is
[RoutedMode]
SupportNATedEndpoints=1
and to port forward 1720.
GnuGk does support Native NAT traversal (without port forwarding) in its own unique way and PacPhone www.pacphone.com uses it (No video but it is coming very soon).
There are 3 H.460 standards covering Native NAT traversal H.460.17/18/19. 17 & 18 deal with signaling 19 deals with media.
get them from here
http://www.packetizer.com/voip/h323/standards.html
As people probably are aware I have added H.460 support to the OpenH323 library (which GnuGk is built on) and currently doing some H.460 work in GnuGk and am keen on extending GnuGk NAT support. If there's sufficient commercial support then I would be happy to add H.460.18/19 support to GnuGk.
Simon
----- Original Message -----
From: "Benjamin Roy" <benroy@xxxxxxxxxxxxxxxxxx>
To: "GNU Gatekeeper Users" <openh323gk-users@xxxxxxxxxxxxxxxxxxxxx>
Sent: Friday, March 02, 2007 7:52 AM
Subject: Re: Endpoints behind NAT
> Hi Ed,
>
> The "IP Telephony Cookbook" linked from
> http://www.gnugk.org/h323infolinks.html, has good descriptions of the
> firewall and NAT issues affecting H.323
>
> In a typical home broadband NAT router situation, you need to deal with
> both the firewall and the NAT problem. Setting the H.323 client as the
> router's DMZ destination, takes care of the firewall. And telling the
> H.323 client what the router's external public IP address is, will correct
> the NAT issue.
>
> GNUGK has some options that let it compensate for the NAT issue, which may
> be useful if the endpoint can't be setup to know about it's public IP.
> Specifically turning on the SupportNATedEndpoints option will help.
>
> I believe some endpoints are starting to include NAT traversal strategies
> like STUN (common in SIP endpoints), and there is some activity relating
> to that in newer H.323 standards.
>
> I hope that helps you.
>
> -Ben
> University of Washington
>
> On Thu, 1 Mar 2007, Ed Greenberg wrote:
>
> > Coming from the SIP world, I'm trying to get my head behind H.323 for
> > Videoconferencing.
> >
> > I have GNUGK set up with several endpoints on the public Internet, and
> > all seems good, but when I try to research NAT settings, everything I
> > read says that you can't do this without firewall holes and ports mapped
> > to specific addresses.
> >
> > Am I missing something?
> >
> > If I send somebody home with an H.323 endpoint, do I need to get into
> > their firewall and open holes?
> >
> > Besides 1720, which ones?
> >
> > If there is something I should read, I haven't found it, and a pointer
> > would be much help.
> >
> > Thanks,
> > </edg>
> >
> >
>
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