Not a recomendation, just some input for you.
IMHO idealy based on a toolkit with a language like firehol[1] with support
for ip_queue to allow interactive functionality like fieryfilter[2].
Client-Server(firewall), wizard and app based filtering suppport like
firestarter[3].
And a GUI similar to guarddog[4]
[1] http://firehol.sf.net
[2] http://0pointer.de/lennart/projects/fieryfilter/
[3] http://www.fs-security.com
[4] http://www.simonzone.com
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