I am fairly Microsoft conversant and run a Windows server with ISA proxy/firewall services....unfortunately my client machines are using a mix of Redhat, Knoppix and WindowsXP and only the WindowsXP machines can access the internet via the ISA proxy server. Knoppix and Redhat can browse www sites but not able to access news, email, etc..
I was thinking about experimenting on my Windows server and dual booting to linux with firewall/proxy ability (either hard drive or CD based).
Any recommendations of what I could use, instructions to get there? or should I just leave alone and keep with the Microsoft firewall/proxy?
thanks in advance.