title: Kubectl proxy shows certificate signed by unknown authority
body: <h1>Question</h1>
  
  <p>What is the cause of the <strong>http: proxy error: x509: certificate signed by unknown authority</strong> when starting <strong>kubectl proxy</strong> with a specific IP of the node?</p>
  
  <pre><code>kubectl proxy --port=8001 --address=172.31.0.16 --accept-hosts='172.31.0.16'
  
  I1222 09:00:03.471836   16775 logs.go:41] http: proxy error: x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "kubernetes")
  </code></pre>