Pluggable Authentication Modules provide a solution to the difficulties of user authentication. Jennifer Vesperman introduces PAM and helps you get started. In this week's Security Alerts, Noel Davis warns about a Remote Shell Trojan Linux-based virus, buffer overflows in fetchmail, and problems in the BSD Line Printer Daemon. In this week's Security Alerts, Noel Davis looks at buffer overflows in OpenUnix 8 utilities, vulnerabilities in the Macromedia ColdFusion server and other weak links in your system. In this first of a three-part series, Carl Constantine covers tools and techniques that system administrators can use to protect their networks, including discussion of nmap, Ethereal, and how to set up honey pots.
Firewalls can potentially block huge amounts of traffic.
Dru Lavigne shows us how to fine-tune our firewall logs to reveal the traffic that concerns us most. Michael Lucas runs a new security trainee through the gauntlet of patching live servers. He also shows how to instill a healthy attitude toward network security in those you work with by teaching them to be properly paranoid. Dru Lavigne explains how to create IPFW firewall rules. 850's Web Server.