LAN Server Properties

For Minecraft 1.12.2–1.21, Forge and Fabric.

Minecraft 1.20.5 and 1.20.6 will not be supported due to a lack of available time. However, PR is always welcomed.

This branch is for 1.21, hopefully it will work in future versions (although very unlikely).

When this mod is installed, it enhances the vanilla Minecraft "Open to LAN" screen, which now also:

• Allows for a port customization.
• Allows a user to disable PvP.
• Allows a user to disable the online mode, so that also unauthenticated players can join the LAN server.
• Allows editing server configuration from the same "Open to LAN" button after the server is published.
• Allows changing maximum number of players.
• Optionally allows the use of genuine UUID (From Microsoft/Mojang) in offline mode, this prevents the loss of inventory contents when switching from online mode to offline mode.

Note

• This mod is client-only, installing on a dedicated server does nothing.
• Only the Lan server owner need to install this mod.
• Vanilla clients can join your server even if you install this mod, note that other mods you have may prevent vanilla clients from joining.
• Installing this mod does not prevent you from joining other vanilla or mod servers.

Dependencies

Forge and Neoforge Version

You need to install Forge/Neoforge and then install this mod.

Fabric Version

You need to install Fabric Loader and then install this mod. Fabric API is optional but highly recommended.

For developers

To modify and debug the code, first import the "neoforge", "forge", or "fabric" folder as a Gradle project in Eclipse IDE, and then run the gradle task genEclipseRuns.

Windows users need to replace ./ and ../ with .\ and ..\, respectively.

Since 1.17.1, LSP for Fabric and Forge share common code as much as possible. The shared code base uses Minecraft official mapping.

Since 1.21, LSP has added support for Neoforge while keeping the support for the Lex-Forge. In addition, coremods and access transformers are dropped completely and replaced by Mixin.

Compile Fabric artifact

git clone https://github.com/rikka0w0/LanServerProperties.git
cd LanServerProperties/fabric
./gradlew build

To debug in Fabric, one may need to create run/config/fabric_loader_dependencies.json with the following content:

{
  "version": 1,
  "overrides": {
    "lanserverproperties": {
      "-depends": {
        "minecraft": "IGNORED",
        "fabricloader": "IGNORED"
      }
    }
  }
} 

Compile Forge artifact

git clone https://github.com/rikka0w0/LanServerProperties.git
cd LanServerProperties/forge
./gradlew build

To specify JRE path:

• Since 1.20.5, Minecraft requires Java 21.
• Since 1.18, Minecraft requires Java 17.
• Since 1.17, Minecraft requires Java 16.
• Older version requires Java 8.

Linux:

./gradlew -Dorg.gradle.java.home=/path_to_jdk_directory <commands>

Windows:

.\gradlew.bat -D org.gradle.java.home="C:/Program Files/Java/jdk-21" runClient