Knowing how to check what ports are open on a server is a crucial skill for system administrators and network engineers. Open ports can be a security risk, as they can provide an entry point for attackers. By identifying and closing unnecessary ports, you can reduce the risk of a security breach.
There are a number of different ways to check what ports are open on a server. One common method is to use the netstat command. Netstat is a command-line tool that displays information about network connections, including the local and remote ports that are being used.