Juniper - firewall toolkit Juniper is a firewall toolkit product for building secure and effective Internet firewalls. Designed to work on a dual homed bastion host that does not forward packets between interfaces. Open Source. (Jan 2000)
SINUS - open source firewall SINUS provides security without obscurity. The SINUS Firewall is a TCP/IP packet filter for the Linux operating system. It is distributed under the GNU General Public Licence and comes with complete source code (Jan 2000)
Books about FirewallA complete list of books on Firewall available through Amazon.COM