**Note:** This is not needed for e4mc 5.4.0+ as they implemented a whitelist there<\/p>\n
—<\/p>\n
# LANLock<\/p>\n
A few days ago, I stumbled across LANGuard,
\na mod that achieves the same thing as this one and also contributed to it.
\nAs this was my first ever contact with Java and Minecraft Mod Development,
\nI started to work on a new PR but soon noticed that I’m basically rewriting the entire mod.
\nSo I thought, it would be better if I just start a fully own mod that uses a different approach to enforce the whitelist.
\nAnd here we are \ud83d\ude42<\/p>\n
Also a thanks to Ovilli for creating their mod that is the start of this one.<\/p>\n
## Reason for this mod<\/p>\n
More and more players are using mods like e4mc to make their LAN worlds publicly available.
\nBut griefers have noticed this too and as LAN worlds provide no tooling to prevent anyone from joining, this starts to become a risk (see this video).
\nWith this mod I tried to recreate the Minecraft Server whitelist system as closely as possible (with my non-existent Java knowledge).<\/p>\n
## Features<\/p>\n
– a whitelist similar to the server counterpart
\n – stores name and UUID
\n – UUID is used to check if connecting player is on the whitelist
\n– config screen made with Cloth Config in modmenu for easy configuration
\n – automatically resolves UUID for added player names asynchronously
\n – option to disable the whitelist entirely
\n – option to use names instead of UUIDs for checking (for testing)
\n– same options accessible via the client side command `\/lanlock`<\/p>\n
## Important<\/p>\n
As of version `1.3.5`, Cloth Config API is not a hard dependency anymore.<\/p>\n
So if you want to configure the mod via Modmenu in a GUI, you need to install both Modmenu and Cloth Config API by yourself.<\/p>\n
## Technical<\/p>\n
Other than LANGuard, LANLock doesn’t even allow non whitelisted
\nplayers to join the server by modifying the connection process with a mixin.
\nSo this and the usage of UUIDs differentiate this mod from LANGuard
\nand at least from my understanding of programming should make it more secure.<\/p>\n
## License<\/p>\n
MIT<\/p>\n","protected":false},"excerpt":{"rendered":"
a whitelist for LAN worlds e.g. when opening them to the public with e4mc<\/p>\n","protected":false},"featured_media":91742,"template":"","meta":{"_minecraft_slug":"lanlock","_minecraft_project_id":"MslL8bqz","_minecraft_author":"technicfan","_minecraft_license":"MIT","_minecraft_downloads":13306,"_minecraft_follows":9,"_minecraft_client_side":"required","_minecraft_server_side":"required","_minecraft_storage_type":"zip","_minecraft_archive_name":"lanlock.zip","_minecraft_size_bytes":298788,"_minecraft_version_count":15,"_minecraft_updated_at":"2026-05-16T00:29:42.565701Z","_minecraft_date_created":"2025-06-07T22:37:38.389420Z","_minecraft_date_modified":"2026-04-01T17:18:20.758450Z","_minecraft_project_url":"https:\/\/modrinth.com\/mod\/lanlock","_minecraft_icon_attachment_id":91742,"_minecraft_imported_at":"2026-06-05T05:48:24+00:00","_minecraft_import_hash":"93ae63921faf662cfb8050ea7056a229","_minecraft_versions":"","_minecraft_links":"","_minecraft_gallery":"","_minecraft_api_metadata":""},"mod_category":[97,126,98,92],"mod_loader":[99,100],"minecraft_version":[56,57,58,59,36,60,93,94,101,102,62,37,40,41,73,74,38,78,79,80,81,82,83,167,163],"class_list":["post-91741","mod","type-mod","status-publish","has-post-thumbnail","hentry","mod_category-fabric","mod_category-management","mod_category-quilt","mod_category-utility","mod_loader-fabric","mod_loader-quilt","minecraft_version-1-19-2","minecraft_version-1-19-3","minecraft_version-1-19-4","minecraft_version-1-20","minecraft_version-1-20-1","minecraft_version-1-20-2","minecraft_version-1-20-3","minecraft_version-1-20-4","minecraft_version-1-20-5","minecraft_version-1-20-6","minecraft_version-1-21","minecraft_version-1-21-1","minecraft_version-1-21-10","minecraft_version-1-21-11","minecraft_version-1-21-2","minecraft_version-1-21-3","minecraft_version-1-21-4","minecraft_version-1-21-5","minecraft_version-1-21-6","minecraft_version-1-21-7","minecraft_version-1-21-8","minecraft_version-1-21-9","minecraft_version-26-1","minecraft_version-26-1-1","minecraft_version-26-1-2"],"yoast_head":"\n