NetCat (or nc) is a utility that allows you to create TCP and UDP connections. Functionally similar to telnet... Available by default on Unix and macOS, not available on Windows.
To use NetCat, do the following:
nc -v example.com 80
In the team instead of
example.com specify the IP or address of the site to which you want to connect (the address must be specified without
https:// at the beginning and
/ at the end), and instead of
80 - the port on which the connection should be made. There are several useful keys to use the utility:
-v- detailed output of information in the course of work.
-t- ensuring compatibility with Telnet protocol.
-u- connection via UDP protocol. The default is TCP.
Connection to example.com 80 port [tcp/http] succeeded!
http the protocol by which the connection was made will be displayed.
connect to example.com port 80 (tcp) failed: Connection refused
To get out of
nc press combination Ctrl+C.