I want to learn nmap and its various options. What can I do or setup in order to see examples of issues found by nmap - e.g., something with security holes on purpose.

  • U could nmap localhost first.... – F. Hauri Mar 2 '13 at 17:53

There is a specific URL for that : scanme.nmap.org

Hello, and welcome to Scanme.Nmap.Org, a service provided by the Nmap Security Scanner Project and Insecure.Org.

We set up this machine to help folks learn about Nmap and also to test and make sure that their Nmap installation (or Internet connection) is working properly. You are authorized to scan this machine with Nmap or other port scanners. Try not to hammer on the server too hard. A few scans in a day is fine, but dont scan 100 times a day or use this site to test your ssh brute-force password cracking tool.

Thanks -Fyodor

If you are looking for vulnerable webapp here are some good lists :

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nmap won't disclose security holes, nmap will only disclose what services are running.

I'd highly recommend downloading virtualbox then getting an vunerable webserver like metasploitable to run on it. That way you can scan until your hearts content and also futher research what exploits etc are possible.

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  • 4
    With Nmap scripting engine and scripts you can detect and exploit vulnerabilities. – Cristian Dobre Mar 2 '13 at 11:08

Take a look at Metasploitable (http://www.offensive-security.com/metasploit-unleashed/Metasploitable)

It is a Virtual machine that has a whole bunch of vulnerable services installed. There is a tutorial that walk through how to exploit each service, part of this will be using NMAP to fingerprint the services.

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