title: Understanding IIS 7 log files
body: <p>I'm trying to debug a 405 error that is occurring in an ASP.NET 4.0 website with a jQuery AJAX post, and I've got the following from an IIS log file.</p>
  
  <p><code>2012-07-02 15:15:37 XXX.XX.XX.XXX POST /AjaxWebMethods.aspx/TestWebMethod - 443 - XXX.XX.XX.XX 
  Mozilla/5.0+(Windows+NT+5.1;+rv:13.0)+Gecko/20100101+Firefox/13.0.1 405 0 0 218</code></p>
  
  <p><strong>My question:</strong> what does the <code>405 0 0 218</code> at the end of the log signify? I'm assuming that the 405 portion is the client error number, but what are the 3 remaining numbers?</p>