A server tool that allows to you join any external server from friend list.

I heard a rumor that a world allows to connect external servers are no longer usable since 1.21.20, so I made one. 1.21.20 でコンソールなどで特集サーバー以外に接続するワールドが使えなくなった, という噂を聞いたので作ってみました. とても適当です.

This server/tool can be hosted just like opening a world, with no port forwarding required to other players to join. このサーバー/ツールは手軽にワールドを開く感覚で, ポート開放不要で使用できます.

Compared to other methods (like DNS forwarding), You can just add a friend, and that's it. 従来の方法 (DNSなど) に比べて, フレンドを追加するだけで大丈夫です.

If you have Go installed on your device, you can run go install github.com/lactyy/idou@latest, then run idou from command-line.

If you haven't installed Go on your device, you can download an executable from Releases tab, then run ./idou.

The location where you ran the command will be the data folder, which contains a database for remembering servers which players has added, and an auth.cred file that stores your credentials.

Your IP addresses will be broadcasted to the players connecting to the world via signaling. It is highly recommended to host this server on a separated network.

Please use a separate account for hosting this, to avoid getting flagged.

Thanks to the authors of df-mc/nethernet-spec to writing the specification.

A huge thanks to Da1z981 for joining the debugging, and the community for helping.