The default listening port for a WarMUX (formerly Wormux) game server — an open-source turn-based artillery game.
WarMUX is a free turn-based artillery game in the Worms mould, started as Wormux in 2002 and renamed in 2010; IANA registered 3826 to its game server. The shipped server config in the project's own tree uses 3826, and the Debian warmux-servers package installs the standalone game server and the index server that publishes public games. Development stopped years ago — the last upstream release is from 2011 — so a listener here is a long-running hobby server or an old distro package still enabled.
Expose with care
A public game server is meant to accept strangers, but this one is unmaintained C++ parsing untrusted network input, so run it as an unprivileged user in a container and do not co-locate it with anything you care about.
$ nc -vz TARGET 3826Seen this on your network? Beige Box scans your Wi-Fi and shows every open port on every device — and its Ports tool links straight back here.
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Corrections or a missing port? Reply @rimrocksystems.