Thanks to all who posted. Appreciate the time ye took. I'll let ye know how it goes.
KevWCFE (16th May 2012)
Thanks to all again. I forgot to let you know how it went. I implemented Michael's suggestion of stopping the browsers from running and it worked perfectly. As I mentioned above there are only three browsers installed and the students don't have access to install anything else so that worked for me.
I was then able to quickly turn off that group policy after the exam on the Saturday morning so all would be ready for normal classes on the Monday.
Quick and easy.
Thank you people.
Forgive me as I just skim read this but a few options have been suggested but not sure if they have been added together:
Create AD Group and add all the PCs you want to restrict
Create a new GPO and filter it to apply to the above AD group only and make sure you enforce it so that it doesn't get overwritten by another policy
set the proxy to: 127.0.0.1 (any port)
(also just realised I'm a little late to the party - but this may be useful for future...)
Last edited by Gatt; 16th May 2012 at 10:14 AM.
This is what I set up at the local college one room for exams, all you need to do is reserve that room of PC's DHCP addresses on the server and in your filter list put a block all internet access rule on your filtering server and then that range of IPs' will not have internet access but WILL be able to access the network. I was using Squid and Dansguardian at the time and works flawlessly!
Aslong as all the browsers are going through the proxy - which ours where even through firefox and chrome there would be no internet access "if students tried to access the internet they would get a "this page has been blocked" or an "Access is denied" page - and it only worked for that room as that room was on a certain range of IP's.
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