Server Login

# Server Login

> **This is a beta release.** The mod works and is tested, but it is new and has not yet been

> through many different servers and modpacks. Back up your world before installing, and please

> report anything that breaks — bug reports at this stage are what make the next version solid.

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If your server runs in offline mode, anyone can join using anyone else's name. There is nothing

stopping a stranger from connecting as you, walking into your base and emptying your chests.

Server Login fixes that. Players pick a password the first time they join, and type it every time

after. Until they do, they cannot move, chat, attack, open chests, or touch anything in the world.

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**Your players do not need to install anything.** The mod lives on the server. Everyone connects

with the normal Minecraft launcher, exactly as before.

## What players see

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They join and land right where they left off — no lobby, no teleport, no dark room. A message

appears telling them what to type:

```

/login mypassword

```

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First time on the server, they type it twice to set it:

```

/login mypassword mypassword

```

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That's the whole thing. One command, and they're playing.

## Setting it up

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1. You need a Minecraft **1.20.1** server running **Forge 47.4.10** or newer.

2. Put the mod file into your server's `mods` folder.

3. Open `server.properties` and set `online-mode=false`.

4. Start the server.

That's it. Passwords are saved with your world, in `world/serverlogin/users.json`. Back that file up

along with the world — losing it means everyone has to register again.

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## Commands

For players:

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| Command | What it does |

| --- | --- |

| `/login <password>` | Log in |

| `/login <password> <password>` | Register, the first time |

| `/changepassword` | Change your password |

| `/logout` | Log out |

`/l` works as a shortcut for `/login`.

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For admins (needs permission level 3):

| Command | What it does |

| --- | --- |

| `/auth count` | How many players are registered |

| `/auth status <player>` | Check if someone is registered |

| `/auth remove <player>` | Delete an account, so they can register again |

| `/auth queue` | Who is still sitting at the login screen |

| `/auth kick <player> [reason]` | Kick someone who never logged in |

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`/auth remove` is what you use when a player forgets their password.

## Language

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The mod comes in English and Russian. Open `config/serverlogin-common.toml` and set:

```toml

[general]

language = "ru_ru"

```

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You can also rewrite any message yourself — greetings, error messages, the kick text — without

touching the mod file. There is a short guide in the

[README](https://github.com/iwosw/server-login#language).

## Good to know

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**Passwords are stored safely.** They are never written down as plain text, not in the account file

and not in your server log. Even you cannot read them — which is also why a forgotten password can

only be reset with `/auth remove`, never recovered.

**Guessing is slow going.** After a handful of wrong tries the account locks for a minute, and the

server limits how fast password attempts can be made overall.

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**If you run a modpack with Simple Voice Chat,** voice needs one small exception to work, and it is

already allowed by default. If some other mod misbehaves before players log in, the `[gate]` section

of the config is where you fix it — the [README](https://github.com/iwosw/server-login#authentication-gate)

explains how to find out exactly what to add.

**This protects names on your server, nothing more.** It is not a firewall, not DDoS protection, and

it does not encrypt the connection. It stops impersonation, which on an offline server is the thing

that actually ruins bases.

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## Something broken?

Tell me in the comments, or open an issue on

[GitHub](https://github.com/iwosw/server-login/issues). If you find an actual security hole, please

report it privately through

[GitHub Security Advisories](https://github.com/iwosw/server-login/security/advisories/new) instead

Compatibility

Minecraft: Java Edition

Platforms

Supported environments

Links

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