title: windows authentication: negotiate, ntlm and kerberos
body: <p>First of all are <code>negotiate</code>, <code>ntlm</code> and <code>kerberos</code> three different implementation of windows authentication?</p>
  
  <p>IE sends this:
  <code>Authorization: Negotiate YIIFswYGKwYB ...</code></p>
  
  <p>Firefox sends this:
  <code>Authorization: NTLM TlRMTVNTUAADAA ...</code></p>
  
  <p>Do they use different protocols? If so how to configure iis 7.0 so that only <code>ntlm</code> would be used?</p>
  
  <p>p.s. iis is configured to use windows auth, but both browsers throw login forms and login only succeeds for firefox.</p>