1. Forward TCP port 1720 across the NAT to the GW. 2. Likewise for H.245 port(s), or avoid separate H.245 connection by using fast start and/or H.245 tunneling. 3. If possible, also forward UDP ports used for RTP/RTCP. 4. Set H245Routed=1 At this point, it should be working. It may be possible to turn off ProxyForNAT, which can improve quality when the originating phone and the GW are both distant from the GK. Good luck, Stewart ----- Original Message ----- From: "Vincent" <receive4me@xxxxxxxxx> To: <Openh323gk-users@xxxxxxxxxxxxxxxxxxxxx> Sent: Monday, March 21, 2005 8:11 AM Subject: gateway behind NAT > Hi all, > > How can I configure GNUGK to support running PSTN gateway behind a NAT? i.e. > > H323 phone ----> GNUGK ---> NAT ----> PSTN Gateway ----> PSTN > > PSTN gateway registered with GNUGK okay. Calls from H323 phones were > routed by GNUGK correctly to PSTN gateway but did not get to PSTN > gateway. > > > [RoutedMode] > GKRouted=1 > SupportNATedEndpoints=1 > > [Proxy] > Enable=1 > ProxyForNAT=1 > ProxyForSameNAT=0 > > Please help. Many Thanks. > Vincent ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________________ List: Openh323gk-users@xxxxxxxxxxxxxxxxxxxxx Archive: http://sourceforge.net/mailarchive/forum.php?forum_id=8549 Homepage: http://www.gnugk.org/