Knowledge base
Guides and fixes for ProximaMP products: your own servers, the ProximaTunnel tunnel and the ProximaClient launcher.
For developers
Server configuration
Networking
- Minecraft server without port forwarding: ProximaTunnelProximaTunnel is a Minecraft mod and plugin (1.16+) that lets friends join your local server — no port forwarding, no public IP, no hosting. Setup guide.
- Configuring ProximaTunnel: server password and iconHow to configure ProximaTunnel: set a password to join your server and an icon in the local servers list — via ProximaClient or manually in config.yml.
- How to play Minecraft with friends without HamachiHow to play Minecraft with friends without Hamachi or port forwarding: connect by a short address via ProximaTunnel — no VPN on your friends' side.
Beginner guides
- How to create a Minecraft server on your PCStep-by-step guide: how to create your own Minecraft server on a PC for free — pick a core, install Java, configure it and let friends in without hosting.
- How to create a Minecraft server in ProximaClientHow to create a Minecraft server in ProximaClient: add a server, pick a core and version or a ready-made template, set RAM and enable ProximaTunnel. No command line, no configs.
- How to transfer a singleplayer world to a serverHow to transfer a singleplayer Minecraft world to a server: fast with ProximaClient (import from saves) or manually via the save folder and level-name. Mods caveats.
- How to install plugins on a Minecraft serverHow to install plugins on a Minecraft server: where to drop the .jar, which cores support plugins (Paper/Spigot/Bukkit), where to get them safely, and installing from Modrinth in ProximaClient.
Troubleshooting
- UnsupportedClassVersionError: which Java you needThe server crashes with UnsupportedClassVersionError or a JNI error — it's the wrong Java version. A table of Java per Minecraft version, how to install the right one, and how ProximaClient handles it.
- Failed to bind to port in Minecraft: how to fixThe Failed to bind to port error in Minecraft means the port is already in use. How to find what's holding it, change the server port or close the process — and how ProximaClient handles it.
- Minecraft server closes immediately: accept the EULAYour Minecraft server creates files and closes right away? You need to accept the license (EULA): set eula=true in eula.txt — or do it in a couple of clicks with ProximaClient.