nc netcat opening listening ports

nc netcat opening listening ports – Netcat scan examples
Establish a connection to a remote port if open:

[~]# nc -vn 22
Ncat: Connected to

As you see, netcat was able to reach 22 port and establish the connection successfully.

UDP port connections are also allowed with netcat, as you can see in the next example:

[~]# ncat -v -u 53
Ncat: Version 7.60 ( )
Ncat: Connected to

Netcat also has the ability to open a remote backdoor on the target system for 5000ms, see below:

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