.3 release.</p></li><li><p><strong>Mixer Call Tracing</strong>. Calls between Envoy and Mixer can now be traced and analyzed in the Zipkin dashboard.</p></li></ul><h3 id=security>Security</h3><ul><li><p><strong>Mutual TLS for TCP Traffic</strong>. In addition to HTTP traffic, mutual TLS is now supported for TCP traffic as well.</p></li><li><p><strong>Identity Provisioning for VMs and Physical Machines</strong>. Auth supports a new mechanism using a per-node agent for
identity provisioning. This agent runs o