Port 6112

Port 6112 is widely recognized within the gaming industry, primarily associated with Blizzard Entertainment’s Battle.net platform. This port is traditionally used by multiplayer games such as Warcraft III, StarCraft, and Diablo series to handle matchmaking, lobby communication, and in-game data exchange. When a game is launched or a user connects to Battle.net, port 6112 facilitates the handshake between the client and the game server, ensuring a stable multiplayer environment.

In addition to Blizzard, other game developers like ArenaNet (Guild Wars) and Relic Entertainment leverage this port for similar purposes. It handles both control commands such as player invites and status updates, as well as real-time game data including player movements and actions. Typically, the client will use an outbound TCP connection to interact with dedicated servers or peer hosts, depending on the game's architecture.

While initially designed around TCP, it is notable that in practice some derivative or proprietary protocols have been layered on top. The port itself is unofficial but has become a de facto standard for legacy and certain contemporary gaming services, playing a critical role in multiplayer gaming infrastructure.