Package nmap-ncat

Nmap's Netcat replacement

http://nmap.org/

Ncat is a feature packed networking utility which will read and
write data across a network from the command line. It uses both
TCP and UDP for communication and is designed to be a reliable
back-end tool to instantly provide network connectivity to other
applications and users. Ncat will not only work with IPv4 and IPv6
but provides the user with a virtually limitless number of potential
uses.

General Commands
Command Description
ncat Concatenate and redirect sockets