symfony/src/Symfony/Framework/WebBundle/Resources/config/user.xml

<?xml version="1.0" ?>

<container xmlns="http://www.symfony-project.org/schema/dic/services"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.symfony-project.org/schema/dic/services http://www.symfony-project.org/schema/dic/services/services-1.0.xsd">

  <parameters>
    <parameter key="user.class">Symfony\Framework\WebBundle\User</parameter>
    <parameter key="user.default_locale">en</parameter>
    <parameter key="user.session.class">Symfony\Framework\WebBundle\Session\NativeSession</parameter>
    <parameter key="user.session.pdo.class">Symfony\Framework\WebBundle\Session\PdoSession</parameter>
    <parameter key="session.options.name">SYMFONY_SESSION</parameter>
    <parameter key="session.options.auto_start">true</parameter>
    <parameter key="session.options.lifetime">false</parameter>
    <parameter key="session.options.path">/</parameter>
    <parameter key="session.options.domain" />
    <parameter key="session.options.secure">false</parameter>
    <parameter key="session.options.httponly">false</parameter>
    <parameter key="session.options.cache_limiter">none</parameter>
    <parameter key="session.options.pdo.db_table">session</parameter>
  </parameters>

  <services>
    <service id="user" class="%user.class%">
      <argument type="service" id="event_dispatcher" />
      <argument type="service" id="user.session" />
      <argument type="collection">
        <argument key="default_locale">%user.default_locale%</argument>
      </argument>
    </service>

    <service id="user.session.native" class="%user.session.class%">
      <argument type="collection">
        <argument key="session_name">%session.options.name%</argument>
        <argument key="session_cookie_lifetime">%session.options.lifetime%</argument>
        <argument key="session_cookie_path">%session.options.path%</argument>
        <argument key="session_cookie_domain">%session.options.domain%</argument>
        <argument key="session_cookie_secure">%session.options.secure%</argument>
        <argument key="session_cookie_httponly">%session.options.httponly%</argument>
        <argument key="session_cache_limiter">%session.options.cache_limiter%</argument>
      </argument>
    </service>

    <service id="user.session.pdo" class="%user.session.pdo.class%">
      <argument type="service" id="pdo_connection" />
      <argument type="collection">
        <argument key="session_name">%session.options.name%</argument>
        <argument key="session_cookie_lifetime">%session.options.lifetime%</argument>
        <argument key="session_cookie_path">%session.options.path%</argument>
        <argument key="session_cookie_domain">%session.options.domain%</argument>
        <argument key="session_cookie_secure">%session.options.secure%</argument>
        <argument key="session_cookie_httponly">%session.options.httponly%</argument>
        <argument key="session_cache_limiter">%session.options.cache_limiter%</argument>
        <argument key="db_table">%session.options.pdo.db_table%</argument>
      </argument>
    </service>

    <service id="user.session" alias="user.session.native" />
  </services>
</container>