Port Scanner

A port scan checks whether specific TCP ports on a host appear open (a service is listening), closed (no service), or filtered (blocked by a firewall).

Use this to quickly confirm if services like SSH (22), HTTPS (443), or RDP (3389) are reachable, or to troubleshoot basic connectivity issues.

From a security perspective, it can also help you identify unexpected open ports that may expose services you didn’t intend to publish. Keeping only the ports you actually need open helps reduce your attack surface and can highlight potential misconfigurations or vulnerabilities to investigate.