title: Find SSO Server / Service solution like CAS but PHP/ASP.NET
body: <p>I want to find a solution like CAS (www.jasig.org/cas) but source code is PHP or ASP.NET.</p>
  
  <p>I have some websites, ex</p>
  
  <ul>
  <li>www.abc.com</li>
  <li>forum.abc.com</li>
  <li>support.abc.com</li>
  <li>*.abc.com</li>
  </ul>
  
  <p>and</p>
  
  <ul>
  <li>www.xyz.com</li>
  <li>*.xyz.com</li>
  </ul>
  
  <p>I want all user data (username, fullname, email, password_hash,...) are strored on 1 server (ex: id.abc.com / id.xyz.com). User just neeed login 1 place for access websites</p>
  
  <p>I can not build a system like jasig CAS just want to find a solution like CAS made by PHP/ASP.NET.</p>
  
  <p>Give me some idea.</p>
  
  <p>Thanks !</p>