The best and most feature of Netcat is that it is used as a port scanner.
On many systems, you can use either Netcat or nc. If you want to specify the range of ports you can do that placing a dash between the first and the last: If you want to send instead of a TCP connection a UDP connection, then you can use the –u option. Do keep in your mind that your connection is encrypted entirely. These function similar to the old Linux “telnet” command. This command shall attempt to initiate a TCP to the particular host on the port number that is specified. The Netcat tool by default operates through by initiating a TCP connection towards a remote host We shall be observing this on an Ubuntu 12.04 VPS, but Netcat must be there on any modern Linux distribution.
4 How to use Netcat to Scan for Open Ports.2 Testing TCP and UDP Connections using Netcat.Moreover the usefulness and flexibility of the Netcat tool triggered the Nmap project to produced Ncat that is a modern reimplementation which supports SSL, IPv6, socks and HTTP proxies, connection brokering and much more, others include the fantastic and versatile Socat, open BSD’s nc, Crypcat, netcat6, pnetcat, SBD and the GNU Netcat. Sometimes it even becomes hard to find a copy of the vl.10 source code. Netcat was released originally by Hobbit in 1995 but was not maintained despite being popular. The device is a feature-rich network debugging and exploring tool as it can relate almost any connection that you would require including port binding to accept incoming connections The Netcat is designed to be a reliable tool that can be used directly and also be driven easily by other programs and scripts.
Though it is not the best tool in a town but of if I get stuck somewhere I would prefer to have Netcat with me on Windows 10, Windows 7 and Windows 8. You need to understand the capabilities of Netcat if you are responsible for network system or system security. Netcat is a utility used to write and read data across TCP and UDP network connections.