Some of those headers are generated by the Heroku infrastructure<p><a href="https:&#x2F;&#x2F;devcenter.heroku.com&#x2F;articles&#x2F;http-routing" rel="nofollow">https:&#x2F;&#x2F;devcenter.heroku.com&#x2F;articles&#x2F;http-routing</a><p><pre><code>    &gt; X-Forwarded-For
    &gt; X-Forwarded-Proto
    &gt; X-Forwarded-Port
    &gt; X-Request-Start
    &gt; X-Request-Id
    &gt; Via
</code></pre>
Plus<p><pre><code>    &gt; X-Request-Id
</code></pre>
Are all Heroku-generated headers