How to implement your own Voter to blacklist IP Addresses

The Symfony2 security component provides several layers toauthenticate users.

The Symfony2 security component provides several layers toauthorize users.

One of the layers is called a `voter`. A voter is a dedicated class that checks

if the user has the rights to be connected to the application. For instance,

Symfony2 provides a layer that checks if the user is fullyauthenticated or if

Symfony2 provides a layer that checks if the user is fullyauthorized or if

it has some expected roles.

It is sometimes useful to create a custom voter to handle a specific case not