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Nmap tries to determine the service protocol (e.g. FTP, SSH, Telnet, HTTP), the application name (e.g. ISC BIND, Apache httpd, Solaris telnetd), the version number, hostname, device type (e.g. printer, router), the OS family (e.g. Windows, Linux).

One of the most powerful features of Nmap is service version detection, which allows users to identify the version of services running on open ports on a remote system.

This article describes how to determine the version of the software the target is running.

Pro Tip: Combine with sV to detect service versions: nmap -p 1-100 -sV 192.168.147.131; Sample Output: PORT STATE SERVICE VERSION 21/tcp open ftp vsftpd 2.3.4 22/tcp open ssh OpenSSH 4.7p1 23/tcp open telnet Linux telnetd ... 3. Scan Multiple Ports/Ranges. Separate ports ...

Jan 20, 2023 · Version detection provides information on all identified open ports interrogating them using probes that generate specific responses by specific services. Version Detection is used with the -sV command, and it allows the user to collect information about the port.

Jan 11, 2025 · Nmap, short for Network Mapper, is an open source command line tool used to scan networks and gather information about the devices and services running on them. Created by Gordon Lyon (aka Fyodor) in 1997, Nmap has grown into the gold standard for network discovery, vulnerability detection, and security auditing.

NMAP uses the “-sV” option to scan services and versions. Alternatively, we can use “-A” to identify the version of services. For example, we use the command below to check the versions on a host with IP 192.168.0.2.

Explore the power of Nmap's service version detection in the field of Cybersecurity. Learn how to effectively identify the versions of services running on target systems, a crucial step in vulnerability assessment and network security analysis.