ervices"><a href=#envoy-passthrough-to-external-services>Envoy passthrough to external services</a><li role=none aria-label="Controlled access to external services"><a href=#controlled-access-to-external-services>Controlled access to external services</a><ol><li role=none aria-label="Change to the blocking-by-default policy"><a href=#change-to-the-blocking-by-default-policy>Change to the blocking-by-default policy</a><li role=none aria-label="Access an external HTTP service"><a href=#access-an-external-http