Why can't steam accounts see all servers. We have server not showing up in steam but stand alone guys can see and join. This is strange because the number servers are 3,5 not showing. 1,2 and 4 show on steam only !.
In case you didn't change the default ports, you have to open these ports: 54297 tcp|udp 64297 tcp 64298 udp 64299 udp AFAIK the last two entries are new.
I agree. Steam users cannot see all servers. Non-steam servers. Steam users can join, my League restarts the server to enter a password and use the raceday profile, and the Steam users cannot see this server. As admin, I have to restart the physical server for Steam users to be able to see the server. This should not be needed. Non-Steam users can see and join perfectly.
tafkams is right, those last two ports are new and were added specifically to support the Steam matchmaker. That also means that if you do not properly open those two ports in your firewall/router, your server might be visible on the ISI matchmaker, but not on the Steam matchmaker.