de class="callout idea"><div class=type><svg class="large-icon"><use xlink:href="/v1.7/img/icons.svg#callout-idea"/></svg></div><div class=content>A sophisticated option involves configuring DNS within the virtual
machine to reference an external DNS server. This option is beyond
the scope of this guide.</div></aside></div></li><li><p>Create <code>sidecar.env</code> file to import the required environment variables:</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ touch &#34;${WORK_