Nmap: Network Exploration and Security Auditing Cookbook - Second Edition

How to do it...

1. To enable service detection, add the Nmap option -sV to your port scan command:

$ nmap -sV <target>  

2. The -sV option adds a table containing an additional column named VERSION, displaying the specific service version, if identified. Additional information will be enclosed in parentheses.

$ nmap -sV scanme.nmap.org    Nmap scan report for scanme.nmap.org (45.33.32.156)    Host is up (1.4s latency).    Other addresses for scanme.nmap.org (not scanned):       2600:3c01::f03c:91ff:fe18:bb2f    Not shown: 994 closed ports    PORT      STATE    SERVICE    VERSION    22/tcp    open     ssh        OpenSSH 6.6.1p1 Ubuntu 2ubuntu2.3      (Ubuntu Linux; protocol 2.0)    25/tcp    filtered smtp    80/tcp    open     http       Apache httpd 2.4.7 ((Ubuntu))    514/tcp   filtered shell  9929/tcp open ...