t the exit code is 56. The code translates to a failure to receive network data.</div></aside></div></li><li><p>Confirm TLS requests without client certificate also fail:</p><pre><code class=language-bash data-expandlinks=true>$ kubectl exec $(kubectl get pod -l app=sleep -o jsonpath={.items..metadata.name}) -c istio-proxy -- curl https://httpbin:8000/headers -o /dev/null -s -w &#39;%{http_code}\n&#39; -k
000
command terminated with exit code 35
</code></pre><div><aside class="callout tip"><div class=type><