The WP-Members Security plugin will allow you to prevent registration based on the user’s IP address, email address, or chosen username. You can also set a custom error message for each one of these criteria. You can restrict a range of IP addresses, or limit email addresses by wildcard (i.e. disallowing specific domains).
The plugin also has settings for:
- Preventing concurrent logins – If a user is logged in, an attempt to log in from another location (IP) will log out the original login.
- Registration form honey pot – Creates a hidden field that bots will fill out but is not displayed in the browser. If there is a value, registration is shut down.
- Require random passwords to be changed on first use.
- Require passwords to be changed after a defined period of time.
- Require strong passwords using the WordPress password strength meter.
- Require current password when changing a password.
Get the Plugin
WP-Members Security is a premium plugin available in the store.
Best Value: this plugin is included in the WP-Members Pro Bundle package.