🔓 Open Ports: What They Mean and Which Ones to Check

When a port is open on your network, it means it's available to receive connections. While this is essential for many services, it can also represent a gateway for threats if not properly configured.

What is a port?

A port is a communication channel used by protocols such as HTTP (port 80) or HTTPS (port 443). Each application or service communicates through one or more specific ports.

Why scan ports?

Port scanning allows you to detect potential vulnerabilities, determine which services are active, and shut down any you don't need.

Which ports to check first?

• 21 (FTP)
• 22 (SSH)
• 23 (Telnet)
• 80 / 443 (Web)
• 3306 (MySQL)
• 8080 (alternative web)

Use our Port Scanner tool to easily analyze your network.