> For the complete documentation index, see [llms.txt](https://unknown-56-works.gitbook.io/luigiscreen/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://unknown-56-works.gitbook.io/luigiscreen/network-guides/public-ip.md).

# Public IP and Port Forwarding

Use this setup when MediaMTX runs at home and OBS connects from outside your home network.

## Requirements

You need:

* A real public IPv4 address or working public DNS name
* Router access
* TCP port forwarding
* A stable LAN address for the MediaMTX computer

This does not work through carrier-grade NAT unless your ISP provides a public address.

## Generate configuration

Run:

```
/screen mediamtx internet
```

The wizard asks for:

1. The MediaMTX computer LAN address when it cannot detect one safely
2. Your public IPv4 address or DNS hostname
3. The public TCP port

## Router rule

Example:

```
Public TCP 40000 -> 192.168.1.50 TCP 55556
```

The public and local ports do not have to match.

## Firewall

Allow inbound TCP `55556` on the MediaMTX computer.

## Security

Do not expose an unauthenticated default MediaMTX configuration. Use the configuration generated by LuigiScreen.

## Test externally

Test from a different network, such as mobile data. Testing your public address from inside the same LAN can fail on routers without NAT loopback.


---

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