So I made a new server, and some people can join. It is my own custom game mode which puts players in a town inhabited by zombies, but it is RP. Some people can join, but others cannot. Some just get kicked while downloading server files, and for others it just does not appear on the server list.
IP is 126.96.36.199
Map is zombiesurvival_b5 if anyone happens to connect and wants to play.