Dimension Bridge

The mod is a server-side bridge with two parts: a Fabric mod on each backend server and a Velocity plugin on the proxy. The Velocity side checks the source server, the destination, the player's client protocol, a cooldown and an authorization window before the connecting player is transferred. Command blocks and the server console can issue transfer requests through the dimensionbridge transfer command when they have sufficient privileges, so portals, dimension gates and lobby menus can move players without the player typing a command.

Because destinations can be restricted by Minecraft protocol version, a lobby server can act as a hub that only connects players to world servers running their version, and a world server can be reached only through approved portals. Transport routes can be set in detail, so a server owner can set up a chain where a player moves from a lobby to one world server and returns to the lobby rather than reaching a second one. Players need access to Velocity's server command bridge permission to use these transfers. The Fabric dependency is Fabric API, and the mod is released under the GNU Lesser General Public License v3.0 or later, so it is open source.