How to Restrict Firewalls to a Specific Request
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How to Restrict Firewalls to a Specific Request
When using the Security component, you can create firewalls that match certain request options.
In most cases, matching against the URL is sufficient, but in special cases you can further
restrict the initialization of a firewall against other options of the request.
Note
You can use any of these restrictions individually or mix them together to get
your desired firewall configuration.
Restricting by Pattern
This is the default restriction and restricts a firewall to only be initialized if the request URL
matches the configured pattern.
- YAML
- XML
- PHP
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# app/config/security.yml
# ...
security:
firewalls:
secured_area:
pattern: ^/admin
# ...The pattern is a regular expression. In this example, the firewall will only be
activated if the URL starts (due to the ^ regex character) with /admin. If
the URL does not match this pattern, the firewall will not be activated and subsequent
firewalls will have the opportunity to be matched for this request.
Restricting by Host
If matching against the pattern only is not enough, the request can also be matched againsthost. When the configuration option host is set, the firewall will be restricted to
only initialize if the host from the request matches against the configuration.
- YAML
- XML
- PHP
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# app/config/security.yml
# ...
security:
firewalls:
secured_area:
host: ^admin\.example\.com$
# ...The host (like the pattern) is a regular expression. In this example,
the firewall will only be activated if the host is equal exactly (due to
the ^ and $ regex characters) to the hostname admin.example.com.
If the hostname does not match this pattern, the firewall will not be activated
and subsequent firewalls will have the opportunity to be matched for this
request.
Restricting by HTTP Methods
The configuration option methods restricts the initialization of the firewall to
the provided HTTP methods.
- YAML
- XML
- PHP
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# app/config/security.yml
# ...
security:
firewalls:
secured_area:
methods: [GET, POST]
# ...In this example, the firewall will only be activated if the HTTP method of the
request is either GET or POST. If the method is not in the array of the
allowed methods, the firewall will not be activated and subsequent firewalls will again
have the opportunity to be matched for this request.
