Port scanning and Nmap 3.5

Thursday, 25 March 2004, 6:43 PM EST

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.

[ Read more ]

Related items




Spotlight

Staples customers likely the latest victims of credit card breach

Posted on 21 October 2014.  |  Multiple banks say they have identified a pattern of credit and debit card fraud suggesting that several Staples Inc. office supply locations in the Northeastern United States are currently dealing with a data breach.


Weekly newsletter

Reading our newsletter every Monday will keep you up-to-date with security news.
  



Daily digest

Receive a daily digest of the latest security news.
  

DON'T
MISS

Wed, Oct 22nd
    COPYRIGHT 1998-2014 BY HELP NET SECURITY.   // READ OUR PRIVACY POLICY // ABOUT US // ADVERTISE //