Ncat is a feature-packed networking utility which reads and writes
data across networks from the command line. Ncat was written for the Nmap
Project and is the culmination of the currently splintered family of Netcat
incarnations. It 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.
Among Ncat's vast number of features there is the ability to chain Ncats
together; redirection of TCP, UDP, and SCTP ports to other sites; SSL support; and proxy
connections via SOCKS4 or HTTP proxies (with optional proxy
authentication as well). Some general principles apply to most applications
and thus give you the capability of instantly adding networking support to
software that would normally never support it.