VIAaaS/README.md

VIAaaS

VIAaaS - ViaVersion acetylsalicylic acid as a Service - Standalone ViaVersion proxy

How to use: server.example.com._p25565._v1_12_2._uBACKUSERNAME.viaaas.example.com (similar to tor to web proxies)

Default Minecraft: viaaas.localhost with port 25565

Default WS URL: wss://localhost:25543/ws

• VIAaaS auth page is designed for storing accounts in the player's browser local storage. It requires a CORS Proxy for calling Mojang APIs, which may make Mojang see that as suspicious and reset/block your account password if the IP address is suspect.

• There are some information about Mojang password resetting: https://github.com/GeyserMC/Geyser/wiki/Common-Issues#mojang-resetting-account-credentials and https://mobile.twitter.com/MojangSupport/status/863697596350517248

• VIAaaS may have security vulnerabilities, make sure to block the ports in firewall and take care of browser local storage.

Download: https://github.com/ViaVersion/VIAaaS/actions (needs to be logged into GitHub)

Requires Java 11

How to start VIAaaS server:

• java -jar VIAaaS-all.jar

Usage for offline mode:

• Connect to mc.example.com._v1_8.viaaas.localhost

Usage for online mode:

• You can use two accounts (avoids Bad Login error) or the same account for front-end and back-end connections.
• You should set up a CORS Proxy (something like https://www.npmjs.com/package/cors-anywhere, git clone https://github.com/Rob--W/cors-anywhere && cd cors-anywhere && npm install && node server.js) on the machine you are using the VIAaaS authenticator webpage.
• Go to VIAaaS auth webpage (https://localhost:25543/), configure the CORS Proxy URL (something like http://localhost:8080/, note the ending slash) and listen to the username A that you're using to connect to the proxy.
• Add the account B you'll use in _u parameter to browser auth page.
• Connect to mc.example.com._v1_8._u(account B).viaaas.localhost (_u(account B) parameter can be removed if you are using the same account)
• Approve the login in auth webpage
• Minecraft client will give Bad Login after you approve the login in your browser if you are using the same account. You can use https://www.curseforge.com/minecraft/mc-mods/auth-me for reauthenticate the client.

WARNING

VIAaaS may trigger anti-cheats, due to block, item, movement and other differences between versions. USE AT OWN RISK

FAQ

VIAaaS is stuck when connecting with online mode:

• Your system may have low entropy, see https://wiki.archlinux.org/index.php/Rng-tools