Is your network open to the internet?

Your public IP address: 216.73.217.52

Choose a test

Extended testThe 1,000 most common ports. About 5 seconds, once every 5 minutes. Full testAll 65,535 TCP ports. About 2–3 minutes, once per hour.

I own this internet connection or have permission to test it. Run the test

The test only checks the address your browser connects from, so run it from the network you want to check. It finds what answers from the internet, not every possible problem. A port that answers only now and then can be missed.

What about UDP?

This test only checks TCP ports. UDP ports cannot be tested reliably this way: UDP has no connection handshake, so a closed port and a port behind a firewall usually both stay silent. Telling them apart needs a probe made for each service.

Services that use UDP include DNS (53), NTP (123), SNMP (161), UPnP (1900), IPsec (500, 4500), OpenVPN (1194), WireGuard (51820) and SIP (5060). Check your router’s port forwarding list for UDP rules, and remove any you don’t need.

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