juanfont.headscale/docs/reverse-proxy.md

# Running headscale behind a reverse proxy

Running headscale behind a reverse proxy is useful when running multiple applications on the same server, and you want to reuse the same external IP and port - usually tcp/443 for HTTPS.

### WebSockets

The reverse proxy MUST be configured to support WebSockets, as it is needed for clients running Tailscale v1.30+.

WebSockets support is required when using the headscale embedded DERP server. In this case, you will also need to expose the UDP port used for STUN (by default, udp/3478). Please check our [config-example.yaml](https://github.com/juanfont/headscale/blob/main/config-example.yaml).

### TLS

Headscale can be configured not to use TLS, leaving it to the reverse proxy to handle. Add the following configuration values to your headscale config file.

```yaml
server_url: https://<YOUR_SERVER_NAME> # This should be the FQDN at which headscale will be served
listen_addr: 0.0.0.0:8080
metrics_listen_addr: 0.0.0.0:9090
tls_cert_path: ""
tls_key_path: ""
```

## nginx

The following example configuration can be used in your nginx setup, substituting values as necessary. `<IP:PORT>` should be the IP address and port where headscale is running. In most cases, this will be `http://localhost:8080`.

```Nginx
map $http_upgrade $connection_upgrade {
    default      keep-alive;
    'websocket'  upgrade;
    ''           close;
}

server {
    listen 80;
	listen [::]:80;

	listen 443      ssl http2;
	listen [::]:443 ssl http2;

    server_name <YOUR_SERVER_NAME>;

    ssl_certificate <PATH_TO_CERT>;
    ssl_certificate_key <PATH_CERT_KEY>;
    ssl_protocols TLSv1.2 TLSv1.3;

    location / {
        proxy_pass http://<IP:PORT>;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
        proxy_set_header Host $server_name;
        proxy_redirect http:// https://;
        proxy_buffering off;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $http_x_forwarded_proto;
        add_header Strict-Transport-Security "max-age=15552000; includeSubDomains" always;
    }
}
```