title: Squid webbased proxy authentication
body: <p>I am new with Squid, currently i have successfully setup basic authentication using external ACL to validate username and password. This works great, but I want to have a custom login page "HTML based" to authenticate a user.</p>
  
  <p>Currently this is my setting that works:</p>
  
  <pre><code>auth_param basic program /usr/bin/php ./app.php
  external_acl_type tcgloginhelper ttl=1800 %SRC %LOGIN %{Proxy-Authorization} /usr/bin/php ./app.php
  acl tcglogin external tcgloginhelper
  http_access allow tcglogin
  </code></pre>
  
  <p>Is it possible to have a custom html login page? How can this be done?</p>