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Todd Lahman's comment spam blocking plugin that blocks automated spam with zero false positives.

By: Todd Lahman.

(41)
Last Updated: 10 months ago
70,000+ active installs
Compatible up to: 4.4.4

The fastest firewall plugin for WordPress.

By: Jeff Starr, aldolat, John Hoff, jameswilkes, Julio Potier, and lernerconsulting.

(44)
Last Updated: 4 months ago
60,000+ active installs
Compatible up to: 4.5.3
(422)
Last Updated: 5 days ago
40,000+ active installs
Compatible up to: 4.6

Allow or disallow visitors from certain countries accessing (parts of) your website

By: Pascal.

(89)
Last Updated: 3 months ago
20,000+ active installs
Compatible up to: 4.5.3

To protect your Blog from automated spambots, this plugin adds invisible formfields to your comment form.

By: kubi23.

(12)
Last Updated: 3 months ago
10,000+ active installs
Compatible up to: 4.4.5

The AVH First Defense Against Spam plugin gives you the ability to block spammers before any content is served.

By: petervanderdoes.

(14)
Last Updated: 5 days ago
10,000+ active installs
Compatible up to: 4.5.3

WP Anti Spam can anti automated spambots or anti spams by"comment","ip","name","email","url".

By: boliquan.

(3)
Last Updated: 2 years ago
7,000+ active installs
Compatible up to: 4.0.12
(15)
Last Updated: 2 years ago
5,000+ active installs
Compatible up to: 4.1.12

Monitor and display registered users activity (logins, posts, comments, etc.). You can also track and prevent hackering attemps, with IP blacklisting.

By: Dric.

(4)
Last Updated: 4 years ago
4,000+ active installs
Compatible up to: 3.5.2

NoFollow Free removes the "nofollow" tag from your WordPress blog's comments with a lot of custom options and provides the option to insert a "NoFollo

By: michelem.

(0)
Last Updated: 6 years ago
3,000+ active installs
Compatible up to: 2.9 - 2.8 - 2.7 - 2.6 - 2.5 - 2.3 - 2.2.3 - 2.2.2

Grants or denies access to a list of IP addresses

By: GabSoftware.

(1)
Last Updated: 4 years ago
2,000+ active installs
Compatible up to: 3.3.2

Gatekeeper allows administrators to take a WordPress site offline while leaving it accessible to authorized users for maintenance, testing, etc.

By: jamiewilson.

(3)
Last Updated: 1 year ago
1,000+ active installs
Compatible up to: 4.1.12

Extend Visitor Maps and Who's Online with extra features, such as IP and referer banning. Display the referring host name and search string.

By: President McCheese.

(1)
Last Updated: 2 years ago
1,000+ active installs
Compatible up to: 3.8.15

Malware removal and security plugin. Periodically perform a full scan for malware, breaches security analysis and check if the domain is in blacklist.

By: http://www.bestiaweb.com.

(2)
Last Updated: 8 months ago
1,000+ active installs
Compatible up to: 4.3.5

Prevent User Registration Spam, and Track New User IP address

By: Justin Parr.

(7)
Last Updated: 1 year ago
1,000+ active installs
Compatible up to: 4.2.9

Protect your site against bad bots by trapping them in a virtual blackhole.

By: Jeff Starr.

(6)
Last Updated: 4 months ago
1,000+ active installs
Compatible up to: 4.5.3

The WP Spam Blacklister is a simple spam-prevention plugin that adds the IP address of a marked spam post on WordPress' comments blacklist.

By: blueliquiddesigns.

(1)
Last Updated: 4 years ago
1,000+ active installs
Compatible up to: 3.4.2

CloudFlare Threat Management allows you to manage all banning, unbanning, and clearing of IP addresses across your entire CloudFlare account.

By: The Digital Hippies and The Plugin Factory.

(3)
Last Updated: 3 years ago
900+ active installs
Compatible up to: 3.5.2

WP-BlackCheck is an Anti-Spam Solution for WordPress blocking spam using local detection and a centralized Blacklist Service.

By: Stargazer.

(1)
Last Updated: 4 months ago
600+ active installs
Compatible up to: 4.5.3

Plugin tool for assembling lists of IP addresses, emails, and URLs from spam comments.

By: Luke Mlsna.

(0)
Last Updated: 4 years ago
300+ active installs
Compatible up to: 3.5.2

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