May 2018
Intermediate to advanced
326 pages
8h 32m
English
Content preview from Practical Network Scanning
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Understanding an Nmap fingerprint
OS fingerprinting is a technique used to determine the type and version of the operating system running on a remote host. The nmap-os-db data file contains thousands of signatures. However, different remote operating systems respond to Nmap's specialized OS detection probes. A fingerprint contains an operating system's name, its general classification, and response data pattern.
A typical fingerprint format appears as shown in the following figure. During detection probe, attributes and results are compared against the Nmap os-db OS database. A simple command can be used for OS detection with the flag -O:
#sudo nmap --O <ip or ip subnet>
The following screenshot is specific to the Cisco 2820 device and shows ...
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