November 2019
Beginner
550 pages
13h 14m
English
Content preview from Learn Kali Linux 2019
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Obtaining operating system and service versions using Nmap
So far, we have been able to gather basic details about a target. We can use Nmap to help users determine the operating system, the operating system version, and the service versions of any running applications on a target.
Using the -A operator will initiate an aggressive scan, -O will profile the operating system, and -sV will identify service versions.
Performing an aggressive type of scan can potentially be flagged by an Intrusive Detection System/Intrusive Prevention System (IDS/IPS) or a firewall appliance. Be wary of this, as a big part of penetration testing is being as silent as possible to avoid detection.
Using the nmap -A -O -sV target command on our Metasploitable VM ...
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