Wednesday 9 July 2014

How to test a listening TCP/UDP port through nc

Netcat (nc) can also be used for a lot of other purposes. It can also be used as a very fast basic port scanner, you can scan a port or a range.

To scan a range of UDP ports 1 to 1000:
nc -vzu destination_ip 1-1000
To scan a range of TCP ports 1 to 1000
nc -vz destination_ip 1-1000

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