Plugin OnlyProxyJoin

OnlyProxyJoin, proxy access protection

OnlyProxyJoin is a lightweight Spigot plugin for a Java Edition Minecraft server connected to a BungeeCord proxy. It checks incoming connections and blocks players who try to reach the backend server directly instead of joining through the authorized proxy. This is especially useful for networks using offline mode, where direct access could expose backend servers to unauthorized connections.

The plugin offers simple configuration for the proxy address and a customizable kick message. Its main role is to add an extra access control layer, while firewall rules and correct proxy forwarding remain important for stronger protection. At BoxToPlay, we present it as a practical utility for classic proxy based server networks.