http://www-users.rwth-aachen.de/jens.hektor/security/cisco-acl.html This was posted to the securityfocus.com archives. Basically it's a perl script to setup anti spoofing rules and some more on cisco-routers based on the routing information it finds. Ciao, David ___________________________________ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]