UsernameIpLock

# IpLock A server-side Fabric mod that prevents account takeovers on offline-mode Minecraft servers by binding each username to the IP address it first joined from. ## How it works When a player joins for the first time, their username is permanently bound to their IP address. If the same username later connects from a different IP, that IP is immediately banned and the connection is rejected. This makes it effectively impossible to impersonate an existing player from a different machine. - **First join** — username is bound to the connecting IP, player joins normally. - **Same IP** — player joins normally. - **Different IP** — connection is rejected and the new IP is banned. Data is stored in `iplock/bindings.json` and `iplock/bans.json` inside the server's run directory. ## Commands All commands require operator level 3 (admin). | Command | Description | |---|---| | `/iplock list` | Show all username → IP bindings | | `/iplock bans` | Show all banned IPs and which username they tried to use | | `/iplock unban <ip>` | Remove an IP from the ban list | | `/iplock reset <username>` | Delete a username's IP binding (allows them to re-bind from a new IP) |