re what type of mTLS traffic the sidecar will accept.</li><li><code>DestinationRule</code> is used to configure what type of TLS traffic the sidecar will send.</li><li>Port names, or automatic protocol selection, determines which protocol the sidecar will parse traffic as.</li></ul><h2 id=auto-mtls>Auto mTLS</h2><p>As described above, a <code>DestinationRule</code> controls whether outgoing traffic uses mTLS or not.
However, configuring this for every workload can be tedious. Typically, you want Istio to al