Users in the meeting cannot see each other's video while jvb is on the internal network

I am using jitsi docker images(stable-7577) , the host of docker is on the internal network cannot access to the Internet. The browser connects to jitsi through haproxy.
In this case, users in the meeting cannot see each other’s video.
I set DOCKER_HOST_ADDRESS to the docker host IP or haproxy’s public IP and they doesn’t work.
How to do it right?

Thanks!

You need to port forward from public IP to the bridge UDP port 10000.