SIP open-relay self-check

Determine whether a SIP endpoint you administer is operating as an open relay — accepting INVITE requests from arbitrary external sources and forwarding them to arbitrary destinations.

This service runs a single defensive probe against your edge: an optional OPTIONS fingerprint, followed by one INVITE with a Request-URI in the RFC 2606 reserved .example TLD. Ownership of the target is verified before the open-relay test runs.

Target Host or IP Transport Port

Requester Email (for verification)

Next step: you'll be shown a one-shot SIP manipulation rule to install on your SBC. The probe runs automatically once that rule is verified.