title: upstream connect error or disconnect/reset before headers EnvoyProxy
body: <p>It seems that the source IP changes after going through envoy. After reading this:
  <a href="https://www.envoyproxy.io/docs/envoy/latest/configuration/listeners/listener_filters/original_src_filter#example-listener-configuration" rel="nofollow noreferrer">https://www.envoyproxy.io/docs/envoy/latest/configuration/listeners/listener_filters/original_src_filter#example-listener-configuration</a>
  I tried adding the below to the listener at port 80 no connection could be made on that port.</p>
  <pre><code>listener_filters:
    - name: envoy.filters.listener.original_src
    typed_config:
    &quot;@type&quot;: type.googleapis.com/envoy.extensions.filters.listener.original_src.v3.OriginalSrc
    mark: 123
  </code></pre>
  <p>The Error I got after hitting any endpoint on that listener:
  <code>upstream connect error or disconnect/reset before headers. reset reason: connection failure</code></p>
  <p>How to prevent envoy from changing the source ip and why did I get this error?</p>