highlighter-rouge">ratings</code> service. In contrast, if you log in as user “jason” (the <code class="highlighter-rouge">reviews:v2</code> user) you continue to see the black ratings stars.</p></li></ol><h2 id="access-control-using-whitelists">Access control using <em>whitelists</em></h2><p>Istio also supports attribute-based whitelists and blacklists. The following whitelist configuration is equivalent to the <code class="highlighter-rouge">denier</code> configuration in the previous section. The rul