Hi,
Our network has a single gnugk on a public IP, and several users behind NATs, with no problems. It is necessary to set up each NAT so that an inbound call can reach all the required ports. For example, on an ATA186 you need to forward the H.225 channels (typically TCP 1720 and 1721), the H.245 ports (typically TCP 1740 and 1741), and the media ports (typically UDP 10000-10007). For other endpoints, the ports may be different. With many devices, such as the ATA, you can just set them as the DMZ host instead.
Some NATs cause trouble by incorrectly proxying H.323 . They were designed to work with NetMeeting, and have bugs when used with other endpoints. Some have configuration settings that will disable this undesired behavior. With others you are out of luck. Most mainstream consumer NATs (Linksys, D-Link, Netgear) are too stupid to cause trouble, and most professional firewalls (Cisco, Sonicwall) are smart enough to do it right.
--Stewart
----- Original Message ----- From: "Rafat Subhan" <rafat@xxxxxxxxxxxxxxx>
To: <openh323gk-users@xxxxxxxxxxxxxxxxxxxxx>
Sent: Sunday, January 11, 2004 1:17 PM
Subject: Re: gnugk behind NAT questions
Its not possible i think. i tried it with many configurations, was not able to call when GK is on public ip
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