What an interesting project! Perhaps nufw and ISCS (http://iscs.sourceforge.net) can share some ideas. ISCS plans to support the dynamic creation of iptables rules based upon LDAP, AD, NDS, SecureID and RADIUS in version 2.x. It currently supports the dynamic creation of iptables rules based upon the fields of a user's X.509 digital certificate. The scripts to make this happen on the enforcement device are in the project CVS but we are still building the administrative interface. In fact, we may be looking to hire a few developers to accelerate this process. Please feel free to use the scripts if they are of help - John -- John A. Sullivan III Chief Technology Officer Nexus Management +1 207-985-7880 john.sullivan@xxxxxxxxxxxxx --- If you are interested in helping to develop a GPL enterprise class VPN/Firewall/Security device management console, please visit http://iscs.sourceforge.net > I have seen some of this functionality in Checkpoint, and I think that> it would be immensely useful in the iptables community if it is adopted. NuFW provides these sort of things : http://www.nufw.org Code can be considered has beta code. It works but things need to be done (especially a Windows Client ;-). With NuFW, you really filter by User (Group) and not by IP as it often the case.