I found when using proxy in IE, I can not access some web site and the error information is DNS resolution error. But when not using such proxy in IE, the page can be accessed.
1. Proxy will do DNS lookup and proxy will not regard my local DNS settings (proxy has its own DNS settings)?
2. How to write some simple code, which can switch between resolving name by proxy and by my local DNS settings? So that I can do some automatic testing?
thanks in advance,
You --> proxy --> internet --> proxy --> You
2. Depend on the browser, if it's IE then take a look at BHO.