title: What is a Chrome data compression proxy?
body: <p>I am getting lots of clicks to my servers with headers like so:</p>
  
  <pre><code>HTTP_VIA:1.1 Chrome-Compression-Proxy
  HTTP_X_FORWARDED_FOR:105.XXX.XX.XXX,66.249.93.214
  HTTP_FORWARDED:for=105.XXX.XX.XXX
  </code></pre>
  
  <p><code>66.249.93.214</code> is the ip that shows in <code>$_SERVER['REMOTE_ADDR']</code>, while the 105 address is the real IP address of the visitor(I believe). An IP lookup of <code>66.249.93.214</code> shows a google proxy/data center.</p>
  
  <p>Advertisers I work with are complaining that this traffic is bot traffic and should not be paid for. They are seeing thousands of clicks in the 66.249 range.</p>
  
  <p>To me, it looks like some sort of chrome extension. Can anyone tell me what's happening here? And if this traffic is legitimate?</p>