Friday, October 28, 2005

Network Security - Port scan on your server for open ports

Scan your web server for open ports that are currently listening


nmap -p 1-65535 localhost


Running nmap for the first time to scan your listening ports may take a few moments.

After scanning all the open ports on your linux web server, nmap will return output similar to following.


Starting nmap V. 3.00 ( www.insecure.org/nmap/ )
Interesting ports on localhost.localdomain (127.0.0.1):
(The 65528 ports scanned but not shown below are in state: closed)
Port State Service
22/tcp open ssh
25/tcp open smtp
80/tcp open http
113/tcp open auth
443/tcp open https
631/tcp open ipp
3306/tcp open mysql

Nmap run completed -- 1 IP address (1 host up) scanned in 111 seconds



It's imperative that you scan your computer regularly to look for vulnerabilities.



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