registration_limit

The Registration Limit module limits/blocks registration of new user accounts
when the user's IP address was recently used in former logins to existing
accounts.

This is achieved by saving the timestamp and IP whenever a user logs
in to Drupal.

Whenever a new user wants to register for an account the IP address
of that new user is checked against previous logins, and if a match
is found and is within the configured time limit, the registration
is blocked.

Additionally certain IP Addresses can be whitelisted to circumvent
potential blocks.

Submodules

• registration_limit_user_api:
  Integrates with the User API module
  to block registrations via this modules API.