How to properly configure an Apache reverse proxy for multiple domains? or Apache reverse proxy setup

Had this exact headache. For me, it was the backend server’s reverse proxy settings—it was only allowing requests from specific IPs.

Add this to your backend config if it’s Nginx or similar:
```
set_real_ip_from <proxy-ip>;
```

For apache reverse proxy, maybe try `ProxyRequests Off` to avoid misconfigs.