http://nmap.org/misc/hakin9-nmap-ebook-ch1.pdf

That pdf contains an article written for hakin9?s publication by the creators of nmap, the network sec vulnerability testing application…

They wrote it in response to Hakin9?s nagging for people to write articles for them…More here. Trollz hurt bad>>

Mario Loria is a builder of diverse infrastructure with modern workloads on both bare-metal and cloud platforms. He's traversed roles in system administration, network engineering, and DevOps. You can learn more about him here.