Knowledge Base

Ports on a server allow the server to listen for various services. For example, a web server typically uses port 80 to listen for HTTP requests. An SSH server, on the other hand, uses port 22 to listen for SSH connections. However, depending on the operating system and installed services, a server can listen on many different ports.

To see which ports are being listened to on a server, the following command is typically used:

This command will list the TCP (t) and UDP (u) connections and their associated ports (l) that the server is listening on (n).

SSH Commands and Connection:

To connect to a server using SSH, an SSH client is used. You can use the following command in the terminal to connect to a server with an SSH client:

Here, "user" represents your username, and "server_ip_address" represents the IP address of your server. This command initiates a connection to the server via the SSH protocol and will then prompt you to enter your password.

If you're using a different port for your SSH connection, you can specify the port number with the -p option. For example, to connect using port 2222:

This command will establish an SSH connection to the server on port 2222.

This is how listening to ports on a server and connecting to a server using SSH commands are performed.