paster

filters.yml
-----------
...
# generally, you will want to insert your own filters here
httpAuthFilter:
  class: httpAuthFilter
...

app.yml
-------
all:
  auth:
    realm: Password Required
    username: zlosyn
    password: nysloz



apps/backend/lib/httpAuthFilter.class.php
------------------------
<?php
/**
* HTTP Authentication filter for Symfony
*
* http://blog.phpdeveloper.co.nz/2006/10/16/symfony-http-authentication-filter/
* @author James McGlinn
* @version 1
*/
class httpAuthFilter extends sfFilter
{
  /**
  * Execute filter
  *
  * @param sfFilterChain $filterChain
  */
  public function execute ($filterChain)
  {
  // execute filter once
  if ($this->isFirstCall()) {
    if (!isset($_SERVER['PHP_AUTH_USER'])) {
      $this->sendHeadersAndExit();
    }
    if (!($_SERVER['PHP_AUTH_USER'] == sfConfig::get('app_auth_username') && $_SERVER['PHP_AUTH_PW'] == sfConfig::get('app_auth_password'))) {
      $this->sendHeadersAndExit();
    }
  }
  
  // execute next filter
  $filterChain->execute();
  }

  /**
  * Sends HTTP Auth headers and exits
  *
  * @return null
  */
  private function sendHeadersAndExit ()
  {
    header('WWW-Authenticate: Basic realm="' . sfConfig::get('app_auth_realm') . '"');
    header('HTTP/1.0 401 Unauthorized');
    exit;
  }
}