fiddler: how to disable overwrite Header Host

Question

When using Fiddler, it pops up an alert dialog.

Fiddler has detected a protocol violation in session #14.

The Request\'s Host header did not match the URL\'         


        

Answer 1

I didn't understand what the "url host" was supposed to be - I mean, normally, there is only the Host header in HTTP.

Looking closer, it appears that this violation occurs for an initial proxy "setup" request, which looks like this:

 CONNECT targaryen:45633 HTTP/1.1
 Host: targaryen

This is where the error makes sense to me.