Internet Explorer has the annoying habit of silently ignoring your proxy settings if it encounters a problem, which makes supporting and diagnosing the problem a pain in the proverbial.

What makes it even more difficult is the way Internet Explorer interprets the proxy settings has changed from version to version. Settings which worked in Internet Explorer 6 will fail in Internet Explorer 7. So make sure in a corporate environment you fully test the settings before you push out a new version of Internet Explorer to 1000 desktop PCs only to find they can no longer access the internet. The most common setting to fail is Read more about Internet Explorer proxy server settings not working? Check your exceptions. …