I'm developing for mobile devices and to debug I connect devices on WIFI to my IP address. It works well for developing on hardware and debugging on my machine. The only thing I can't make to work is how do I set up Fiddler so it sees traffic coming from external clients?
If I open my site from browser on same machine - fiddler get's it. But when I connect to my PC by IP address from another machine - fiddler doesn't see it.
I have proper settings (I think)
You need to configure Fiddler as a reverse proxy. See Using Fiddler as a Reverse Proxy.