We run several subscription based reference sites aimed at libraries. We use IP authentication to verify that the library is a member.

Many run a proxy server (Easy Proxy is mentioned often). Our salespeople are saying that many of our features cannot be accessed through these proxy servers. Specifically, our flash menu, using cookies, several pages in iFrames and several features requiring Java.

I've got questions about whether it's a 'settings' issue in easyproxy, or if I need to redesign these pages to be accessible to visitors going through a proxy.

I also need to know how to test our site. There are public proxy servers available, but I'm unclear on if they are configured the same as our clients proxy.

Any help very appreciated.