ess gateway, so the Istio ingress gateway could authenticate the ALB.</p><div><aside class="callout warning"><div class=type><svg class="large-icon"><use xlink:href="/v1.26/img/icons.svg#callout-warning"/></svg></div><div class=content>Note that the instructions in this blog post only configure the ALB and the Istio ingress gateway to encrypt the traffic
between them and to verify that they receive valid certificates issued by <a href=https://letsencrypt.org>Let&rsquo;s Encrypt</a>. In
order to specify that