Online Port Scanner / Checker

Tests whether a specific TCP port on a host is open and accepting connections from our server. Useful for confirming a firewall rule actually took effect, checking that a service is listening on the port you expect, or verifying a port is properly closed as part of a security review. A closed or filtered result doesn't mean the same thing — closed means the host actively refused the connection, while filtered/timeout usually means a firewall is silently dropping the packets.

Scanning ports on infrastructure you don't own or have permission to test can trigger automated abuse alerts on the target network — this is intended for checking your own infrastructure or hosts you're authorized to test.

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