Can I scan any server?

Port scanner

Which common services does this host expose to the whole internet?

Live lookupPlain English + technicalFree, no sign-upBeta

Good to know: Scans 20 common service ports. Each address can be scanned once a minute, to keep testing polite.

Red tiles are risky services that shouldn’t face the internet.
Port 25 (server-to-server email) always shows filtered: our network blocks it to prevent spam.

The health check runs this and 30 more checks on a domain, then ranks what to fix.

Firewalls, switches and Wi-Fi bundled for homes and offices.

Scan a host for 20 common open ports and flag risky services exposed to the internet, like Remote Desktop, SMB and databases.

Every result comes in two styles: plain English for everyone, and the exact technical detail for engineers, with the raw JSON one click away.

Only scan servers you own or have permission to test.