Port Checker
Check if a TCP port is open or closed on any host. Useful for firewall testing and server troubleshooting.
Common Ports
How to Use the Port Checker
Enter a hostname or IP address and a port number, then click Check Port. The tool attempts to connect to the host:port using a WebSocket connection. A successful connection means the port is open.
Common Ports
- 80 — HTTP (web)
- 443 — HTTPS (secure web)
- 22 — SSH (secure shell)
- 21 — FTP (file transfer)