Hands-On Penetration Testing with Kali NetHunter

Exercise – using nmap to banner-grab

Now we are going to use NMap tp help us retrieve the banner(s) of a target device:

1. Open a command console.
2. At the console, enter the following command:

Nmap  -sV <target IP address or hostname> 

3. Press Enter.
4. View the results.

You will notice that compared to the results with telnet, these results are somewhat abbreviated, but they give the basics on those services that are running on open ports. If you want more in-depth results, you can vary the command as follows:

• More aggressive Service Detection: nmap -sV --version-intensity 5 <target IP address or hostname>
• Lighter banner-grabbing detection: nmap -sV --version-intensity 0 <target IP address or hostname>

Version Intensity uses values between 0 ...