title: 403 error when opening PDF with chrome pdf viewer
body: <p>We host C# 3.5 net web app in ISS 7.5.</p>
  
  <p>PDF files are generated and put in some directory. Listing of directory is disabled. With all browsers (IE10, FF, Opera...) we can access the PDF.</p>
  
  <p>When accessing the URL with Chrome, PDF is loaded... then we get a 403 error. If we disable chrome internal pdf viewer and tell it to use Adobe's, it works fine.</p>
  
  <p>What can be wrong?</p>