The scan results will show all the host information obtained, such as the IPv4 (and IPv6 if available) address, reverse DNS name, and interesting ports with service names.

A target can be an IP address, a hostname, or a network range: $ nmap To launch a default scan, the bare minimum you need is a target. This is one of the tasks Nmap excels at, so it is important to learn about the essential Nmap options related to port scanning. This recipe describes how to use Nmap to determine the port states of a target, a process used to identify running services commonly referred to as port scanning. Download a PDF of Chapter 1 to read more. Follow along to learn how to perform the quintessential Nmap task, and review Calderon's tips on port scanning techniques, options that affect the scan behavior of Nmap and more. In this excerpt from Chapter 1, 'Nmap Fundamentals,' Calderon shares a recipe on how to use Nmap to find open ports. Paulino Calderon, co-founder of Websec and part-time Nmap developer, wrote Nmap Network Exploration and Security Auditing Cookbook, Third Edition, published by Packt, to offer firsthand insights into using the multifaceted tool. The open source tool helps security pros, networking teams, sys admins and other IT personnel scan hosts, networks, applications, mainframes, Unix and Windows environments, supervisory control and data acquisition systems, and industrial control systems.

Advanced port scanner review