Block users using blacklists domain from registering to your WordPress site.
The AVH First Defense Against Spam plugin gives you the ability to block spammers before any content is served.
Allows more control over site registration by adding managed groups of invitation codes.
This plugin adds creates a whitelist of shortcode tags that can be
applied to comments, bbPress and BuddyPress.
Gatekeeper allows administrators to take a WordPress site offline while leaving it accessible to authorized users for maintenance, testing, etc.
The User Domain Whitelist/Blacklist plugin limits user registration to only registrants with an email address from the domain white list provided by t
Grants or denies access to a list of IP addresses
Enables the use of Albus whitelisting plugin for Bukkit (Minecraft) on WordPress installations
Adds Whitelist and Blacklist options for Trackbacks and Pingbacks
Limit access to the site to those with a cookie token. Visitors without the cookie see a customisable "coming soon" style of page.
Limits access to the site to people on an allowed list of IP addresses.
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