hit.</p><h2 id=using-the-augmented-metrics>Using the augmented metrics</h2><p>To capture all external service traffic in either of the cases (BlackHole or
Passthrough), you will need to monitor <code>istio_requests_total</code> and
<code>istio_tcp_connections_closed_total</code> metrics. Depending upon the Envoy listener
type i.e. TCP proxy or HTTP proxy that gets invoked, one of these metrics
will be incremented.</p><p>Additionally, in case of a TCP proxy listener in order to see the IP address of
the exte