Login Security
Login Security module improves the security options in the login operation of a Drupal site. By default, Drupal introduces only basic access control denying IP access to the full content of the site.
With Login Security module, a site administrator may protect and restrict access by adding access control features to the login forms (default login form in /user and the block called "login form block"). Enabling this module, a site administrator may limit the number of invalid login attempts before blocking accounts, or denying access by IP address, temporarily or permanently. A set of notifications may help the site administrator to know when something is happening with the login form of their site: password and account guessing, bruteforce login attempts or just unexpected behaviour with the login operation.
