t using Istio.">Blog</a></li><li><a href=/v1.8/blog/2019/ title="Blog posts for 2019.">2019 Posts</a></li><li>Monitoring Blocked and Passthrough External Service Traffic</li></ol></nav><article aria-labelledby=title><div class=title-area><div style=width:100%><h1 id=title>Monitoring Blocked and Passthrough External Service Traffic</h1><p class=byline><span>By</span>
<span class=attribution>Neeraj Poddar (Aspen Mesh)</span><span> | </span><span><svg class="icon calendar"><use xlink:href="/v1.8/img/icons.svg#