nmap

Nmap is an abbreviation of 'Network Mapper', as is a widely known free open source hackers tool. Nmap is used for network discovery and security auditing. Plenty of process admins use nmap for network stock, open ports, managing service upgrade schedules, and monitoring host or service uptime. The tool makes use of raw IP packets in creative ways to decide what hosts are obtainable on the network, what services (application name and version) those hosts are offering, what operating systems (and OS versions and feasible patches) and what type and version of packet filters/ firewalls are being used by the target.

Nmap is a popular hacking tool that was originally created to act as a process of having the ability to scan giant networks, but it works absolutely fine o single hosts (targets). Nmap works on all major computer operating systems, and official binary packages are obtainable for Linux, Windows, and Mac OS X. Nmap was historically a command-line tool, but there is a GUI obtainable called 'Zenmap'.