I have been using SmoothWall for about two or so years now and SmoothWall Express 3 once it came out of Bata. The community is large and very helpful. While I have not used the commercial version it seems to be well support (going by the forum posts)
There are many add-ons such as Advance Proxy http://www.advproxy.net/ OpenVPN, SIP Proxy and so on. http://www.smoothwall.org/ Open Source and http://www.smoothwall.net/ for commercial -- Anthony Boyington www.416solutions.com
