Fiddler

Fiddler is a great 'HTTP Debugging Proxy' with many uses.

Redirecting a URL

Say you want to access http://mydomain.com/ but you want to use a test server, or the DNS hasn't propagated yet..

1. Select the 'AutoResponder' tab
2. Check 'Enable automatic responses'
3. Check 'Unmatched requests passthrough'
4. Add a rule with the following items:
   1. URI Matches: regex:http://mydomain.com/?(.*)
   2. Respond With: http://12.34.56.78/$1