H323 NAT issue

Hello


in NAT environment, Video Conferencing device sometime makes one-way communication problem.

Because the device on public network does not know the route to send traffic to the device on private network.

H323 protocol is deal with its IP address directly. so, the device on private network is send the private IP address as contact information to the device on public network.

It's limitation for this H323 protocol. but, most Video Conferencing Device offer the option for NAT traversal.

for example, Cisco Video Conferencing Device has NAT traversal Option like this.
this option require the external IP Address configured 1:1 NAT.

Regards.