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18 changes: 9 additions & 9 deletions reference/configuration/framework.rst
Original file line number Diff line number Diff line change
Expand Up @@ -379,16 +379,16 @@ method might be vulnerable to some of these attacks because it depends on
the configuration of your web server. One simple solution to avoid these
attacks is to whitelist the hosts that your Symfony application can respond
to. That's the purpose of this ``trusted_hosts`` option. If the incoming
request's hostname doesn't match one in this list, the application won't
respond and the user will receive a 500 response.
request's hostname doesn't match one of the regular expressions in this list,
the application won't respond and the user will receive a 400 response.

.. configuration-block::

.. code-block:: yaml

# app/config/config.yml
framework:
trusted_hosts: ['example.com', 'example.org']
trusted_hosts: ['^example\.com$', '^example\.org$']

.. code-block:: xml

Expand All @@ -402,8 +402,8 @@ respond and the user will receive a 500 response.
http://symfony.com/schema/dic/symfony http://symfony.com/schema/dic/symfony/symfony-1.0.xsd">

<framework:config>
<framework:trusted-host>example.com</framework:trusted-host>
<framework:trusted-host>example.org</framework:trusted-host>
<framework:trusted-host>^example\.com$</framework:trusted-host>
<framework:trusted-host>^example\.org$</framework:trusted-host>
<!-- ... -->
</framework:config>
</container>
Expand All @@ -412,17 +412,17 @@ respond and the user will receive a 500 response.

// app/config/config.php
$container->loadFromExtension('framework', array(
'trusted_hosts' => array('example.com', 'example.org'),
'trusted_hosts' => array('^example\.com$', '^example\.org$'),
));

Hosts can also be configured using regular expressions (e.g. ``^(.+\.)?example.com$``),
which make it easier to respond to any subdomain.
Hosts can also be configured to respond to any subdomain, via
``^(.+\.)?example\.com$`` for instance.

In addition, you can also set the trusted hosts in the front controller
using the ``Request::setTrustedHosts()`` method::

// web/app.php
Request::setTrustedHosts(array('^(.+\.)?example.com$', '^(.+\.)?example.org$'));
Request::setTrustedHosts(array('^(.+\.)?example\.com$', '^(.+\.)?example\.org$'));

The default value for this option is an empty array, meaning that the application
can respond to any given host.
Expand Down