You don’t even need to run it as “super-user” (sudo) unless you want to access port numbers below 1024. It’s actually very easy to use Netcat listener by running the Netcat command. How to Use Netcat Listener from Linux Terminal? Of course, the Netcat listener can also be used to send data or even files over the network, but since it is not really secure, it’s not a reasonable option.

Now, let’s get right to the instructions and see how we can use Netcat to listen in on suspicious ports. You can learn more about ports by reading this article on port forwarding. That’s why one of the primary tasks of firewalls is to block all unused ports on servers.

Ports are like communications channels into and out of any computer, and all data needs to pass through them. Programs communicate data over the network using the TCP and UDP protocols, which require the use of ports. Want a better way to host your websites and web apps? Developing something new? Simply don’t like Windows? That’s why we have Linux VPS.

What is the best app to bet on ports