PORT SCANNER
Scan TCP ports on any hostname or IP address. Check which ports are open or closed and identify running services.
TARGET
Ports to scan (comma-separated, max 20)
QUICK EXAMPLES
ABOUT PORT SCANNING
What is Port Scanning?
Port scanning checks whether TCP ports on a host are accepting connections. Open ports indicate that a service is listening — helping you verify that your firewall rules are correct, services are accessible, or debug connectivity issues.
Common Port Numbers
- 22 — SSH (remote access)
- 80 / 443 — HTTP / HTTPS (web)
- 3306 — MySQL database
- 5432 — PostgreSQL database
- 6379 — Redis cache
- 27017 — MongoDB database
- 8080 / 8443 — Alternative HTTP / HTTPS