Thanks Joseph for this contribution. Your article would help a lot of sysadmins to quickly understand and deploy this firewall.

Adoption of opensource solutions at work place is the biggest need for opensource. There are open source solutions for almost everything. However, businesses invest lot of money in closed source solutions, simply because of the easy to take off nature of those solutions. There are  many consultants who can get the basic implementation up and running in matter of days, mapping business requirements to the commercial products. In that sense, your document is a great enabler for IPCop/ CopFilter.

 Anm