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LinuxSecurity.com: Hacks From Pax: Network Server Monitoring With Nmap

Jul 22, 2005, 19:30 (0 Talkback[s])
(Other stories by Pax Dickinson)

"Today we'll discuss hardening Linux servers by scanning for unnecessarily open network ports, and we'll show you how to automate port scanning so you can easily monitor your network for vulnerabilities.

"Portscanning, for the uninitiated, involves sending connection requests to a remote host to determine what ports are open for connections and possibly what services they are exporting. Portscanning is the first step a hacker will take when attempting to penetrate your system, so you should be preemptively scanning your own servers and networks to discover vulnerabilities before someone unfriendly gets there first..."

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