Odd IE proxy problems when distributed by GPO...
I'm having some problems working out exactly whats going wrong with group policy application in one of our ICT rooms and i hope someone can help!
We have a new filtering system that is set to apply different filters depending on which port you route traffic through. Student users have a user group policy set to route traffic through a particular port, thereby getting the correct level of filtering. This works fine all over site apart from one room where the old settings continue to apply irrespective of what I do. The old settings in question point directly to our cachepilot proxy server, by-passing the new filter, and referring internet traffic out to our broadband conection - since taking on our new filter our connection is no longer filtered at LA level, so this means that students are getting unfiltered access to the internet!
I've run an RSOP test on a real student on a real computer in that room and the result gives what i'd expect to see - the proxy address set to our filter. This behaviour is not what happens for real, however. I've been through the policies and can't see any discrepancies; the settings are identical for all intents and purposes to a student logging on in one of our other rooms and getting the right proxy.
I made sure that the Internet settings in group policy were tidied up when i first rolled out the proxy changes; so browser customisations on all policies apart from the one containing the proxy setting were reset. I've tried this again, with no effect. I've cleared all profiles from the PCs in question, so no old settings can be effecting behaviour; i've also edited the student mandatory profile to include the correct proxy address. Nothing yet has worked.
I get the impression that something is blocking the computers from receiving the relevant user policy but can see no errors or behaviour that would explain whats going on or indeed give me any hints as to how to fix.
Any ideas, please?