cro-segmentation with Istio authorization.</p><h3 id=namespace-level-segmentation-via-rbac--conditions>Namespace level segmentation via RBAC + conditions</h3><p>Suppose you have services in the <code>frontend</code> and <code>backend</code> namespaces. You would like to allow all your services
in the <code>frontend</code> namespace to access all services that are marked <code>external</code> in the <code>backend</code> namespace.</p><pre><code class=language-yaml data-expandlinks=true data-repo=istio>apiVer