DShield Distributed Intrusion Detection System collects firewall log excerpts from volunteers. The logs are aggregated and analyzed. Several reports are generated showing trends in attack sources and methods used.
FirewallSupport.com Online support service specifically focused on firewall security. Information and resources to troubleshoot firewall problems.
The Freefire Project Dedicated to Users, Admins and especially Developers of IT-Security Solutions (especially Firewalls) based on Free Software. It features a large Tool overview, some articles on IT-Security and Web Links to other resources.