> ## 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. # Port Registry > Complete port registry for all atl.chat services, verified against compose files. This page lists every port used by atl.chat services, verified against the current `compose.yaml` and `infra/compose/*.yaml` files. All host-side ports are configurable via environment variables in `.env`. ## IRC stack Defined in `infra/compose/irc.yaml`. | Port | Env Variable | Service | Protocol | Bind address | Description | | ------ | -------------------- | ---------- | -------- | ------------- | ------------------------------------------------------------------ | | `6697` | `IRC_TLS_PORT` | UnrealIRCd | TCP | `ATL_CHAT_IP` | IRC over TLS — primary client connection | | `8000` | `IRC_WEBSOCKET_PORT` | UnrealIRCd | TCP | `ATL_CHAT_IP` | IRC WebSocket for web clients | | `8600` | `IRC_RPC_PORT` | UnrealIRCd | TCP | `ATL_CHAT_IP` | JSON-RPC API (used by WebPanel and tooling) | | `6900` | `IRC_SERVER_PORT` | UnrealIRCd | TCP | `ATL_CHAT_IP` | Server-to-server links | | `8081` | `ATHEME_HTTPD_PORT` | Atheme | TCP | `ATL_CHAT_IP` | Atheme HTTP API (Atheme shares the IRC server's network namespace) | | `8080` | `WEBPANEL_PORT` | WebPanel | TCP | `0.0.0.0` | UnrealIRCd admin web panel | The five UnrealIRCd and Atheme ports bind to `ATL_CHAT_IP` (default `127.0.0.1`). The WebPanel port binds to all interfaces (`0.0.0.0`) and does not use `ATL_CHAT_IP`. Atheme uses `network_mode: service:atl-irc-server`, so it shares the IRC server's network stack. The Atheme uplink port (`6901`) is internal to that shared namespace and not exposed to the host. ## XMPP stack Defined in `infra/compose/xmpp.yaml`. | Port | Env Variable | Service | Protocol | Description | | ------ | ----------------------------- | ------------ | -------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `5222` | `PROSODY_C2S_PORT` | Prosody | TCP | XMPP client-to-server (STARTTLS) | | `5223` | `PROSODY_C2S_DIRECT_TLS_PORT` | Prosody | TCP | XMPP client-to-server (Direct TLS) | | `5269` | `PROSODY_S2S_PORT` | Prosody | TCP | XMPP server-to-server federation | | `5270` | `PROSODY_S2S_DIRECT_TLS_PORT` | Prosody | TCP | XMPP server-to-server (Direct TLS) | | `5280` | `PROSODY_HTTP_PORT` | Prosody | TCP | HTTP — BOSH and WebSocket endpoints | | `5000` | `PROSODY_PROXY65_PORT` | Prosody | TCP | SOCKS5 bytestream proxy for file transfers | | `5281` | `PROSODY_HTTPS_PORT` | Nginx (XMPP) | TCP | HTTPS reverse proxy for Prosody | | `443` | *(see note)* | Nginx (XMPP) | TCP | `127.0.0.1:443` only — same vhost/certs as `5281`; clients that use `https:///…` with no port (e.g. Fluux discovery, `wss:///ws`) hit this | ## Web clients | Port | Env Variable | Service | Compose File | Description | | ------ | ------------------ | ----------- | -------------------------------- | -------------------------------------------------------- | | `9000` | `THELOUNGE_PORT` | The Lounge | `infra/compose/thelounge.yaml` | Web IRC client (private mode, requires user account) | | `8090` | `OBSIDIANIRC_PORT` | ObsidianIRC | `infra/compose/obsidianirc.yaml` | Modern web IRC client (custom build, single-server mode) | ## Bridge Defined in `infra/compose/bridge.yaml`. The bridge service does not expose any host ports — it connects outbound to IRC, XMPP, and Discord over the `atl-chat` Docker network and the internet. ## Dev-only services Available when running `just dev` (activates the `dev` Docker Compose profile). | Port | Env Variable | Service | Description | | ------ | ------------- | ------- | --------------------------------------------------------------- | | `8082` | `DOZZLE_PORT` | Dozzle | Docker log viewer (container port `8080` mapped to host `8082`) | ## TURN/STUN (standalone) Deployed separately via `infra/turn-standalone/compose.yaml` using host networking. Not part of the main `compose.yaml` stack. | Port | Protocol | Service | Description | | ------------- | -------- | ------- | ---------------------- | | `3478` | TCP/UDP | Coturn | STUN/TURN relay | | `5349` | TCP | Coturn | TURNS (TLS) | | `49152–49202` | UDP | Coturn | Media relay port range | ## Services not in Docker Compose These services run outside the Docker stack during development: | Port | Service | Description | | ------ | --------------- | ------------------------------------------ | | `3000` | Next.js web app | Run locally with `pnpm dev` in `apps/web/` | ## Customising ports Every host-side port is controlled by an environment variable in `.env`. To change a port, set the variable before starting the stack: ```bash theme={null} # Example: move IRC TLS to port 6698 IRC_TLS_PORT=6698 ``` The IRC stack ports also respect `ATL_CHAT_IP` (default `127.0.0.1`), which controls the bind address. Set it to `0.0.0.0` to listen on all interfaces in production. See the [environment variables reference](/docs/reference/environment-variables) for the full list. ## Related pages * [Environment Variables](/docs/reference/environment-variables) — port variables and bind address configuration * [Networking](/docs/architecture/networking) — full network architecture, Tailscale overlay, and firewall rules * [Deployment](/docs/operations/deployment) — production port binding and Tailscale setup * [Monitoring](/docs/operations/monitoring) — health check endpoints per service