Cisco_pix

InformIT: Cisco ASA and PIX Firewall Logging [4 pages with adds :( ]

http://www.informit.com/articles/article.aspx?p=424447 actually a good article explaining issues with ntp and login config for asa and pixes

Understanding PIX behavior

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