Wich Caching Proxy would be suiteable for Windows 7 Professional Server

Question

I got the following setup:
3 Computer Rooms for Trainign Purposes.
18 PC per room, one of them a Server. All but the Server are protected by Steady State Software (DeepFreeze), with them getting thawed every 1-3 months for Windows and software updates. The only thing allowed to auto-update is the Virus scanner (MS Security
Essentials).
The Server and all Computers are "only" Windows 7 Professional (no real server OS among them).
I managed to minimise the Internet Load for updates by orgianising Offline installers for the software that had them.
But Windows Updates and some of the Adobe Photoshop Updates don't want to be easily accesible offline.
The only thing I can effectively do for those would be a Cachign Proxy. Aside from MSE definitions (multiple updates per day possible), most of the files will be only updated every month or so.
It also does not need to cache normal Internet Traffic, only large files like updates. Maybe only towards very specific servers (like the MS and Adobe update servers).
What options for a caching Proxy server do I have in this scenario?
Let's talk about MVVM: http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/b1a8bf14-4acd-4d77-9df8-bdb95b02dbe2 Please mark post as helpfull and answers respectively.

Answer 1

Hi,
Please refer to the following link:
http://blogs.msdn.com/b/ieinternals/archive/2013/10/11/web-proxy-configuration-and-ie11-changes.aspx
Best Regards,
Vincent Wu
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As I understand it:
If the programm uses the WinINET settings at all (not many do nowadays), the settings is per user. But you can force a system wide value via registery entry.
I asume windows update will use that setting (I read often about having to change odd users proxy settings before). The WU Service runs under the "Local System" Account in a non-interactive session.
So either changing the proxy settings of Local System or setting the OS to use a global setting should redirect it. So it is possible to redirect the Updater (even background downloaders) to use a proxy server.
I would still need a proxy server I can run on a mere Win 7 Pro. Ideally one I can tell to only cache for specific domains/ip adresses* (the one of the Update servers for Adobe and Windows, for example).
And google will result in me hitting links taking about Proxies run by other people before it will ever give me a list of availible server softwares and thier pro/con's.
*I can get those IP adresses/domains either via wireshark or the resource monitor of Windows. So finding out where the data comes from is the least of my worries.
In the meantime I looked into wsus offline updater. While it cannot cover the regular MSE or the odd Adobe updates, it can still handle the bulk of data.
Let's talk about MVVM: http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/b1a8bf14-4acd-4d77-9df8-bdb95b02dbe2 Please mark post as helpfull and answers respectively.