silly minecraft server scanner

matscan is heavily inspired by masscan, and like masscan contains its own tcp stack for maximum speed.

• Adaptive scanning (scans more than just the default port)
• Works well even on relatively low scan rates and with lots of packet drops (running in production at ~70kpps and ~20% loss)
• Can be run in a distributed fashion
• Customizable rescanning (rescan servers with players online more often, etc)
• Customizable target host, target port, protocol version
• Send to a Discord webhook when a player joins/leaves a server
• Detection of duplicate servers that have the same server on every port
• Protocol implementation fingerprinting (can identify vanilla, paper, fabric, forge, bungeecord, velocity, node-minecraft-protocol)
• Historical player tracking
• Offline-mode detection
• Written in Rust 🚀🚀🚀

I highly encourage you to make your own server scanner instead of relying on someone else's code, I promise you'll have a lot more fun that way. Also if you do intend on using any of the code here, please read the license.

It is assumed that you know the basics of server scanning. Otherwise, I recommend reading the masscan readme and documentation. Also be aware that matscan only supports Linux, but you probably shouldn't be running it at home anyways.

Rename config.toml.example to config.toml and fill in the fields.

You'll also have to make a MongoDB database called mcscanner with two collections called servers and bad_servers. You should add a unique index for addr+port and a normal index for timestamp in the servers collection.

# Firewall port 61000 so your OS doesn't close the connections
# Note: You probably want to use something like iptables-persistent to save this across reboots
iptables -A INPUT -p tcp --dport 61000 -j DROP

# Run in release mode
cargo b -r && sudo ./target/release/matscan

You can also use the binary without the rest of the code as long as you put the config.toml and exclude.conf in the same directory as it.