I have a school class where I want to provide internet connectivity.
Only certain computers should be able to connect to the internet, based on the allowed MAC address.
Of those who are allowed to connect to the internet, all browsing needs to go via an external proxy-server, for example ws.proxyserver.com:8080. Normally such an option can be set in the browser setup, but I would like this be set in the router.
Additionally, another computer should be able to access the internet without going via the external proxy.(Voip calls)
I saw that the CISCO 877 and PIX Firewall 501 and similar products that support the IOS CLI have the MAC-LIST PERMIT option but I don't know if and how the external proxy-server via can be accomplished.