Add whitelist feature to admin

[lukefretwell]

Source

ProudCity

Is your feature request related to a problem? Please describe.

Security

Describe the solution you'd like

Add some type of functionality that allows for customers to whitelist access to the content management system.

Describe alternatives you've considered

N/A.

Additional context

• https://themeisle.com/blog/whitelist-ip-addresses-in-wordpress/
• https://wordpress.org/plugins/wp-cerber/