Nmap

Nmap is an open-source network scanner. It is used to discover hosts and services on a computer network by sending packets and analyzing the responses. Features Host discovery Identifying hosts on a network. For example, listing the hosts that respond to TCP and/or ICMP requests or have a particular port open. Port scanning Enumerating the open ports on target hosts. Version detection – Interrogating network services on remote devices to determine application name and version number OS detection – Determining the operating system and hardware characteristics of network devices. Read more