Hi,
I am currently using socket io for signalling between the server and the clients. I make the socket connection on 443 port. We have our own data center and the architecture we are using is in the below image,
All the three mediasoup servers are having the same announced ip as 45.114.x.x and using proxy balancer of apache webserver i direct the socket io traffic to one of the mediasoup servers considering the load on each one of them(i have that login in place to decide that). And Each mediasoup server is given a range of rtcMinPort and rtcMaxPort, using the firewall rules we direct the streams data to specific mediasoup server on which the room is created.(if traffic comes on 10001-12000 port range it should go to mediasoup server 1). Client will always get the announcedIP and a random port in the range of that specific mediasoup server on which the socket io connection is being established(In the iceParameters).
Note: We have kept the range of ports open on firewall for both UDP/TCP bidirectionally.