IpChecker

A minimal Minecraft server that displays client IP addresses.

Usage

./ipchecker                    # Quiet mode (default)
./ipchecker -debug             # Verbose logging
./ipchecker -motd-ip-show      # Show client IP in MOTD
./ipchecker -port=25566        # Custom port
./ipchecker -v                 # Show version

How it works

1. Listens on TCP port 25565 (configurable)
2. Parses Minecraft handshake packets to extract protocol version
3. Handles status requests (server list pings)
4. Disconnects login attempts with the client's IP address and protocol version

Build

go build -o ipchecker main.go

Online

Hosted at: ipchecker.robotig.xyz