title: Security Problems when Extending a Web Application in SharePoint
body: <p>So, I had a site running (<a href="http://servername" rel="nofollow noreferrer">http://servername</a>) and wanted to add another URL, http: newURL to get to the same content.  I wanted both sites to use the same active directory domain for users/authentication.</p>
  
  <p>I extended my existing web application so that the new URL would work.  I configured the authentication provider for the new zone to be the same as my existing one (NTLM and Windows authentication).</p>
  
  <p>The problem is that I can not log into the site via the new URL, with the above security settings.  It keeps saying access denied (IIS access denied page, not SharePoint).
  The only way it will let me in is if I turn on basic authentication which i do not want to do...</p>
  
  <p>What am I missing?
  I also tried to just edit the Alternate Access Mappings without extending the web application and that didnt work at all...</p>