Pix

http://blog.funil.de/sinuspl/2008/08/14/cisco-asa-linux-und-qemu/ Notes about ASA 8.02 firmware: after some tricks with hexdump, dd and gzip, the guy was able to extract linux x86 initrd image from

http://sourceforge.net/projects/pixla/ oss pix log analyzer

http://jeremy.chartier.free.fr/snortalog/what_is_snortalog.html open source software that does firewall log analisys, stats and reporting

http://enterprisenetworksandservers.com/monthly/art.php?2715 article explaning Cisco PIX packet flow. Pls read it if u are planning to touch pix config files