Netcat
¨Network version of
cat utility
¨Allows user to move data across a network using any TCP or UDP port
¨Runs on both Unix and Windows NT
¨Netcat executable nc operates in two modes
Client mode allows user to initiate connection to any TCP or UDP on a remote machine and to take input data from standard input (eg keyboard or output of pipe)
Listen mode (-l option) opens any specified TCP or UDP port on local system and waits for incoming connection and data through port. Data collected is sent
to standard output (eg. Screen or
input of pipe)