<p>As I get started on my Docker journey I wanted to start with a simple application to get my feet wet. I chose the classic <a href="https://github.com/dockersamples/example-voting-app">Example Voting App</a> as it covered a few services, showed Docker Compose and had Kubernetes deployments already in place. When I tried to spin it up I received the following error:</p> <div class="highlight"><pre tabindex="0" style="background-color:#fff;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>Error starting userland proxy: mkdir /port/tcp:0.0.0.0:32787:tcp:172.22.0.2:6379: input/output error</span></span></code></pre></div> <p>Searching this specific issue leads in various directions, but then I saw a comment about having issues while on the corporate VPN, namely Cisco AnyConnect. I searched more specifically around that and across a <a href="https://github.com/docker/for-win/issues/360">Github</a> issue which spoke directly of the problem. In the midst of the <a href="https://github.com/docker/for-win/issues/360#issuecomment-415535460">comments</a> the answer is laid out by  <a href="https://www.juliandileonardo.com/">Julian Di Leonardo</a>.</p>