4.0.0 net.viper.backend backend-join-guard 1.0.0 jar BackendJoinGuard Blocks direct joins to backend servers and only allows proxy IPs. 17 17 UTF-8 papermc https://repo.papermc.io/repository/maven-public/ io.papermc.paper paper-api 1.20.6-R0.1-SNAPSHOT provided BackendJoinGuard src/main/resources false