Echo ==== Echo :ref:`configuration overview `. This extension does not have a structured configuration, `google.protobuf.Empty `_ should be used instead. .. _extension_envoy.filters.network.echo: This extension may be referenced by the qualified name *envoy.filters.network.echo* .. note:: This extension has an unknown security posture and should only be used in deployments where both the downstream and upstream are trusted. .. tip:: This extension extends and can be used with the following extension category: - :ref:`envoy.filters.network `