Browse documentation
Port checks
The port check tool tests whether a specific TCP port is open on a host — handy for confirming a service is listening and reachable. It's under Settings → Tools.
Running a port check
- Enter a target (IP or hostname).
- Choose a port from the presets — HTTP (80), HTTPS (443), SSH (22), RDP (3389), FTP (21), SMTP (25), DNS (53), Telnet (23), or SNMP (161) — or pick Custom and type any port (1–65535).
- Run the check.
Reading the result
- Open — e.g. ✓ Port 443 is OPEN on example.com (45ms), in green, with the connection time.
- Closed — e.g. ✗ Port 443 is CLOSED on example.com — Connection timed out, in red, with the reason.
The time shown is how long the TCP connection took to establish.
Notes & tips
- The check attempts a TCP connection and times out after a few seconds, so a firewalled or filtered port shows as closed.
- Use the presets for common services, or Custom for application-specific ports.