Port checker

Enter a host and port — we'll check if it's open, or scan the common ports.

Common ports:

Checks a single port (or a fixed list of common ones) on a public host. This is not a network scanner.

Hide your open ports and IP — GANVAS VPN

What an open port means

An open port means a service is listening on the server (web on 80/443, SSH on 22, RDP on 3389, etc.). "Closed" means the port refuses the connection, "filtered" means a firewall silently drops packets. Handy for diagnosing your own server and checking that no extra services are exposed.

Close what you don't need

Ports exposed to the internet (especially RDP and databases) are a favorite target for scanners. Keep services behind a VPN: with GANVAS VPN and your own WireGuard config, access goes through the tunnel instead of a public port. Also check blacklists.

FAQ

What does "filtered" mean?›

The port didn't answer in time — usually a firewall silently drops it. "Closed" means the server actively refused, "open" means a service is listening.

Is this a port scanner?›

No. It checks one port at a time or a fixed list of common ports on a public host, rate-limited. You can't scan an arbitrary range.

Related tools

All tools →

→IP & domain lookup →WHOIS domain & IP →Blacklists & RKN →DNS records lookup →Email checker →My IP address

The app: WireGuard config · VLESS client · Tor VPN · VPN for Windows