> ## Documentation Index
> Fetch the complete documentation index at: https://docs.allthingslinux.org/llms.txt
> Use this file to discover all available pages before exploring further.

# XMPP Overview

> Overview of the atl.chat XMPP stack powered by Prosody.

atl.chat's XMPP service is provided by Prosody, a lightweight, extensible XMPP server written in Lua. It supports standard XMPP clients via STARTTLS/TLS, server-to-server federation, and BOSH/WebSocket transports for web clients.

## Components

### Prosody

Prosody handles all XMPP traffic. It is configured via `prosody.cfg.lua` and environment variables, with modules managed through a `source/` directory (for compiled modules) and an `enabled/` directory (for active modules).

### Bridge integration

The bridge connects to Prosody via an XMPP component connection. The component interface allows the bridge to appear as a separate subdomain (e.g., `bridge.atl.chat`) within the XMPP network.

> **Note:** The `component_interfaces` configuration may need adjustment if the bridge container cannot connect. If you experience connectivity issues, verify that the component interface binds to `0.0.0.0` (or the Docker network interface) rather than `127.0.0.1` in `prosody.cfg.lua`.

## Related pages

* [Configuration](/docs/services/xmpp/configuration) — prosody.cfg.lua, env vars, VirtualHosts
* [DNS](/docs/services/xmpp/dns) — SRV records, subdomain layout, federation
* [Modules](/docs/services/xmpp/modules) — source vs enabled dirs, community modules
* [Operations](/docs/services/xmpp/operations) — prosodyctl, adduser, db-backup, health checks