https://forums.alliedmods.net/showthread.php?t=254536
If you are talking about that, it's not an UDP exploit, nor an HLDS exploit :
- i have 6 server running on the same IP, some have people all the day, some are empty all the day.
servers who have people are touched, but some empty server are also touched.
- It's doesn't touche everyone, i have some friends who don't have that favorite display problem when many have it for the same server at the same time
- no steam client probably don't rely on the same base as steam to display server list.
It's rather a problem to the valve server who manage available server.