cheesefather

After the recent global distributed botnet attack on WordPress installations that took down servers and broke into admin accounts, I thought I’d write a plugin to prevent it happening again.
Distributed botnet attacks can come from multiple IP addresses and locations at the same time, so conventional IP-based lockouts are not effective (e.g. those found in Wordfence and other WordPress security plugins).
For example, if 1,000 different computers (with unique IP addresses) are trying to brute-force your admin password and you lock out each IP address after 5 incorrect attempts then you have still allowed 5,000 attempts. My plugin essentially ignores the different IP addresses and locks out all admin login attempts in a configurable way – so if you have it set to 5 failed attempts (default) then those 1,000 different computers will only have a total between them of 5 attempts.
You can select how many login failures causes the lockout, how much time to allow between failures, how long to block logins for and also you can input a whitelisted IP address (or multiple addresses separated with commas or spaces) which can bypass the lockdown and always log in – so you can still always get into your site even in the middle of an attack. There is also support for partial IP address matching for those with dynamic IP addresses. You can also define a secret key to bypass the lock.
<ul>
<li>Any failed login is counted regardless of username or IP address (unless whitelisted)</li>
<li>Once locked down, nobody can log in except from whitelisted IP addresses or using the secret key</li>
<li>You can specify the number of login failures that triggers a lockdown</li>
<li>You can specify the time between failed attempts that should be counted</li>
<li>You can specify how long the lockdown should last</li>
<li>You can add a secret key that bypasses the lockdown</li>
<li>You can customise the lockout message</li>
<li>You can add whitelisted IP addresses that bypass the lockdown</li>
<li>Partial IP address matching for dynamically-allocated IP addresses</li>
<li>Multisite compatible</li>
<li>Available in English, French, German, Italian and Russian</li>
</ul>

Botnet Attack Blocker

This plugin blocks distributed botnet brute-force attacks on your Wordpress installation.

transcendev

Don’t leave your barn door open! Lock down your admin login form and load up another site instead for unwanted guests.
On servers with limited memory, recursive calls to your WordPress admin login panel alone can lead to serious memory and load 
issues that can potentially crash your server. This plugin prevents access to 
the login screen without the correct access code appended to the url.
This plugin will kill the process of loading the admin panel prior to the loading of 
the template, and other such resource intensive processes that occur even when a user is not yet logged in.
How to Use 
1. Create your access code. 
2. Click the Activate Admin Lock checkbox. 
3. Optionally divert traffic to another url. 
4. Future admin login should use the following URL: 
http://www.yoursite.com/wp-admin/?a=CODE 
Where “CODE” is the access code you enter.
Visit <a href="http://www.transcendevelopment.com" rel="nofollow ugc">www.TranscenDevelopment.com</a> for more information.

TD Admin Lock & Load

admin lock, admin locking, wordpress admin security, brute force Requires at least: 3.0 Tested up to: 3.8.1 Stable tag: 1.0.

Botnet Attack Blocker vs TD Admin Lock & Load