title: The AspxAutoCookieProblem in ASP.NET pages
body: <p>I just joined a team to manage a asp.net 4 website with 1000+ pages of the url format </p>
  
  <pre><code>http://www.abcdefgh.com/ShowBooks.aspx?ID=1420
  </code></pre>
  
  <p>but it gets changed to</p>
  
  <pre><code>http://www.abcdefgh.com/(S(sdfdsf9835fgfdjgdfgderd55)X(1))/ShowBooks.aspx?ID=1420
  </code></pre>
  
  <p>or</p>
  
  <pre><code>http://www.abcdefgh.com/ShowBooks.aspx?ID=1420&amp;AspxAutoDetectCookieSupport=1420 
  </code></pre>
  
  <p>This I suppose is happening from a couple of months and the traffic is heavy on this site. How can i prevent this url changing from happening. I want all url's to be of this format only </p>
  
  <pre><code>http://www.abcdefgh.com/ShowBooks.aspx?ID=1420
  </code></pre>
  
  <p>I have noticed three entries in my web.config</p>
  
  <pre><code>&lt;authentication mode="Forms"&gt;             
  &lt;forms cookieless="UseCookies" loginUrl="~/NoAccess.aspx" name="FORMAUTH"/&gt;
  &lt;/authentication&gt; 
  
  &lt;sessionState cookieless="AutoDetect"/&gt;
  
  &lt;anonymousIdentification cookieless="AutoDetect" enabled="false"/&gt;
  </code></pre>
  
  <p>What disadvantage will it have if I remove cookieless attribute from these url's. WIll it break the earlier bookmarked urls or will Google SEO be affected in any way? </p>
  
  <p>Please help me with details.</p>