Port 29920

Nintendo Wi-Fi Connection functioned as a proprietary online service suite supporting the Nintendo DS and Wii game consoles. It allowed consoles to connect to Nintendo's servers via broadband internet, enabling features such as matchmaking, multiplayer gameplay, downloadable content distribution, leaderboards, and game data synchronization. The service primarily utilized various UDP and TCP ports, often dynamically assigned by game titles, but certain ports such as 29920 were common in unofficial or peer-to-peer components.

From a networking perspective, Nintendo Wi-Fi employed a combination of direct peer-to-peer connections and centralized lobby servers to facilitate smooth multiplayer experiences. Games could use Network Address Translation traversal techniques to allow direct gameplay despite the presence of home routers and firewalls, employing NAT punch-through methods. The data transmitted could include game state updates, chat messages, friend invites, and matchmaking queries.

Nintendo Wi-Fi Connection operated between 2005 until its discontinuation in 2014, after which Nintendo transitioned to other network services. Today, residual or unofficial services might still use related ports for fan-hosted servers or custom matchmaking solutions. Due to this, port 29920 is still occasionally associated with unofficial efforts to replicate original functionality.