wanna-be-a-Debian-system-administrator » port scanning http://debian.kitaj.net Mon, 17 May 2010 10:02:50 +0000 http://wordpress.org/?v=2.9.2 en hourly 1 Port scanning with nmap http://debian.kitaj.net/2008/10/port-scanning-with-nmap/ http://debian.kitaj.net/2008/10/port-scanning-with-nmap/#comments Thu, 23 Oct 2008 10:31:40 +0000 Mitja http://debian.kitaj.net/?p=36 Nmap is an useful tool for checking the security of a server. Since I don’t use it very often I’ve made a list of useful resources to check when in need.

The first advice, also praised by nmap authors, I got from Trinity from The Matrix Reloaded film.

nmap -v -sS -O 10.2.2.2

-v – verbose output (try -vv for even more verbose)
-sS – “the default and most popular scan option for good reasons”*
-O – OS discovery

Since my server is behind (hope) a good firewall I had to add -P0 option.

nmap portscanner howto

Describing the basic nmap scans

Nmap – Free Security Scanner For Network Exploration & Security Audits

Nmap official page

Nmap reference guide

Nmap manual

Insecure.Org – Nmap Free Security Scanner, Tools & Hacking resources

News and links

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