AltAuth
AltAuth allows banned accounts to join servers with AltAuth.
About this Mod
AltAuth has not been updated to recent Minecraft versions. Since Mojang accounts have become completly unusable I have no need anymore for the modification, although the banned and multiplayer disabled accounts functionality should still work.
AltAuth
AltAuth is a solution to allow players with Mojang account, (untested) banned accounts and (untested) multiplayer disabled accounts to join online mode Minecraft servers depending on client and server support.
This works by redirecting the session server requests to a proxy specified by the server.
Trusting the AltAuth proxy session server used by the server is required, as a malicious proxy server can use your Minecraft account for up to 48 (Mojang account) or 24 (Microsoft account) hours on ALL servers. You can select in-game which AltAuth proxy servers you trust. A server using AltAuth has to trust its selected AltAuth proxy server that it prevents unauthenticated users from joining. More information on setting up an AltAuth proxy and a technical overview can be found on the GitHub page https://github.com/lixfel/AltAuth.
Available Versions
How to Install AltAuth on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set bukkit Loader
In the panel under "Egg", select the bukkit loader and matching Minecraft version (1.19.2).
Install Mod
Open the mod browser in the dashboard and search for "AltAuth". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.19.2
Server-side
~ OptionalRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
AltAuth server crashes on startup – what to do?
Most common cause: wrong bukkit version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.19.2). You can switch loaders with one click in the panel.
Is AltAuth compatible with bukkit and bungeecord and fabric and paper and spigot and waterfall?
AltAuth officially supports bukkit, bungeecord, fabric, paper, spigot, waterfall for Minecraft 1.19.2. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with AltAuth – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if AltAuth consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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Rent Modded Server
Install AltAuth with just one click on your server.