NewsForge: Port Scanning and Nmap 3.5

“Inspired by the release of Nmap 3.5, the latest version of the
award-winning network security tool, I’ve been exploring network
security issues for a couple of weeks now. Nmap’s major skill is
port scanning–learning which ports on a machine are ‘open’ and
what applications are using them. Sound network security planning
dictates that you take a look at your network machines to see what
the bad guys can see from outside.

“Think of a port as being an extension of a machine’s IP
address. The IP address itself equates to a street address for an
apartment complex. The port number equates to a specific apartment.
When packets are sent across the Internet, they include the port
number they are destined for as well as the machine address…”

Complete Story

Get the Free Newsletter!

Subscribe to Developer Insider for top news, trends, & analysis