RAFEEQ UR REHMAN lives in Columbus, OH and has designed and implemented IT solutions for many large corporations. He obtained his bachelorís and masterís degrees in Electrical and Computer Engineering from the University of Engineering and Technology, Lahore. He holds certifications in HP-UX, Solaris, and Check Point administration, as well as Ciscoís CCNA, Microsoftís MCSE, and the prestigious CISSP security certification. His books include HP Certified: System and Network Administration; The Linux Development Platform; and Intrusion Detection Systems with Snort.