Port 18401

Port 18401 serves as a communication channel for the massively multiplayer online rhythm game, Audition Online Dance Battle's Brazil servers operated by KAIZEN. It uses both TCP and UDP protocols, combining the reliability of TCP for sensitive data such as login sessions and rankings, with UDP's low latency transmission for in-game action like dance move synchronization and animations.

Typically, the client connects to these servers through port 18401 to authenticate players, manage matchmaking, and exchange real-time gameplay data. The TCP traffic ensures that initial handshakes, authentication tokens, chat messages, and player stats are transmitted reliably and in order. Meanwhile, the UDP stream handles latency-sensitive data including dance commands, real-time actions, and quick state updates, which can tolerate some packet loss but require minimal delay.

The service often coexists within a client-server architecture hosted regionally to facilitate better gameplay experience by reducing lag. Port 18401 may also handle event triggers, room management, and potentially integrate spectator modes, making it essential for continuous and synchronized multiplayer sessions.