I am looking for many possibilities for a firewall for a client who wants to bring in Web and email and keep the network secure. However, this must be cost effective. This is a non-profit who cannot afford a PIX so please don't offer that as a solution. They are willing to use Software running on Windows NT4, Linux, Sun, or hardware solutions, but it would need to be less than $1,000.00 to implement. They are on a DSL 3 MB connection and would like to have VPN ability as well.
I have seen the Linksys BEFVP41 and I think that would be a fine residential solution, but what about commercial use?