System Administration

Build Virtual Network Labs Using Cisco, Juniper, and More

Building a Mail Server with Courier and Cyrus

A No-Nonsense Guide to the OpenBSD Firewall

Router and Switch Management, the Easy Way

An Introduction to Kernel Hacking

Attack Detection and Response with iptables, psad, and fwsnort

System and Network Monitoring

An Essential Guide for the Accidental Admin

Email for the Practical Paranoid

Using Wireshark to Solve Real-World Network Problems

A Comprehensive, Illustrated Internet Protocols Reference

A Visual Introduction to Internet Protocols

101 Scripts for Linux, OS X, and UNIX Systems