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111 lines
4.5 KiB
Markdown
111 lines
4.5 KiB
Markdown
# Mjolnir (Matrix Moderation Tool) {#module-services-mjolnir}
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This chapter will show you how to set up your own, self-hosted
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[Mjolnir](https://github.com/matrix-org/mjolnir) instance.
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As an all-in-one moderation tool, it can protect your server from
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malicious invites, spam messages, and whatever else you don't want.
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In addition to server-level protection, Mjolnir is great for communities
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wanting to protect their rooms without having to use their personal
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accounts for moderation.
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The bot by default includes support for bans, redactions, anti-spam,
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server ACLs, room directory changes, room alias transfers, account
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deactivation, room shutdown, and more.
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See the [README](https://github.com/matrix-org/mjolnir#readme)
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page and the [Moderator's guide](https://github.com/matrix-org/mjolnir/blob/main/docs/moderators.md)
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for additional instructions on how to setup and use Mjolnir.
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For [additional settings](#opt-services.mjolnir.settings)
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see [the default configuration](https://github.com/matrix-org/mjolnir/blob/main/config/default.yaml).
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## Mjolnir Setup {#module-services-mjolnir-setup}
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First create a new Room which will be used as a management room for Mjolnir. In
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this room, Mjolnir will log possible errors and debugging information. You'll
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need to set this Room-ID in [services.mjolnir.managementRoom](#opt-services.mjolnir.managementRoom).
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Next, create a new user for Mjolnir on your homeserver, if not present already.
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The Mjolnir Matrix user expects to be free of any rate limiting.
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See [Synapse #6286](https://github.com/matrix-org/synapse/issues/6286)
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for an example on how to achieve this.
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If you want Mjolnir to be able to deactivate users, move room aliases, shutdown rooms, etc.
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you'll need to make the Mjolnir user a Matrix server admin.
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Now invite the Mjolnir user to the management room.
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It is recommended to use [Pantalaimon](https://github.com/matrix-org/pantalaimon),
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so your management room can be encrypted. This also applies if you are looking to moderate an encrypted room.
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To enable the Pantalaimon E2E Proxy for mjolnir, enable
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[services.mjolnir.pantalaimon](#opt-services.mjolnir.pantalaimon.enable). This will
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autoconfigure a new Pantalaimon instance, which will connect to the homeserver
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set in [services.mjolnir.homeserverUrl](#opt-services.mjolnir.homeserverUrl) and Mjolnir itself
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will be configured to connect to the new Pantalaimon instance.
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```
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{
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services.mjolnir = {
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enable = true;
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homeserverUrl = "https://matrix.domain.tld";
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pantalaimon = {
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enable = true;
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username = "mjolnir";
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passwordFile = "/run/secrets/mjolnir-password";
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};
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protectedRooms = [
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"https://matrix.to/#/!xxx:domain.tld"
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];
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managementRoom = "!yyy:domain.tld";
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};
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}
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```
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### Element Matrix Services (EMS) {#module-services-mjolnir-setup-ems}
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If you are using a managed ["Element Matrix Services (EMS)"](https://ems.element.io/)
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server, you will need to consent to the terms and conditions. Upon startup, an error
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log entry with a URL to the consent page will be generated.
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## Synapse Antispam Module {#module-services-mjolnir-matrix-synapse-antispam}
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A Synapse module is also available to apply the same rulesets the bot
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uses across an entire homeserver.
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To use the Antispam Module, add `matrix-synapse-plugins.matrix-synapse-mjolnir-antispam`
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to the Synapse plugin list and enable the `mjolnir.Module` module.
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```
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{
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services.matrix-synapse = {
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plugins = with pkgs; [
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matrix-synapse-plugins.matrix-synapse-mjolnir-antispam
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];
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extraConfig = ''
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modules:
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- module: mjolnir.Module
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config:
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# Prevent servers/users in the ban lists from inviting users on this
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# server to rooms. Default true.
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block_invites: true
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# Flag messages sent by servers/users in the ban lists as spam. Currently
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# this means that spammy messages will appear as empty to users. Default
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# false.
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block_messages: false
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# Remove users from the user directory search by filtering matrix IDs and
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# display names by the entries in the user ban list. Default false.
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block_usernames: false
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# The room IDs of the ban lists to honour. Unlike other parts of Mjolnir,
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# this list cannot be room aliases or permalinks. This server is expected
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# to already be joined to the room - Mjolnir will not automatically join
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# these rooms.
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ban_lists:
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- "!roomid:example.org"
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'';
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};
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}
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```
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