Takayuki Miyoshi

<p>Really Simple CAPTCHA does not work alone and is intended to work with other plugins. It is originally created for <a href="https://contactform7.com/" rel="nofollow ugc">Contact Form 7</a>, however, you can use it with your own plugin.</p>
<p>Note: This product is “really simple” as its name suggests, i.e., it is not strongly secure. If you need perfect security, you should try other solutions.</p>
<h4>How does it work?</h4>
<p>Really Simple CAPTCHA does not use PHP “Sessions” for storing states, unlike many other PHP CAPTCHA solutions, but stores them as temporary files. This allows you to embed it into WordPress without worrying about conflicts.</p>
<p>When you generate a CAPTCHA, Really Simple CAPTCHA creates two files for it; one is an image file of CAPTCHA, and the other is a text file which stores the correct answer to the CAPTCHA.</p>
<p>The two files have the same (random) prefix in their file names, for example, “a7hk3ux8p.png” and “a7hk3ux8p.txt.” In this case, for example, when the respondent answers “K5GF” as an answer to the “a7hk3ux8p.png” image, then Really Simple CAPTCHA calculates hash of “K5GF” and tests it against the hash stored in the “a7hk3ux8p.txt” file. If the two match, the answer is confirmed as correct.</p>
<h4>How to use with your plugin</h4>
<p>Note: Below are instructions for plugin developers.</p>
<p>First, create an instance of ReallySimpleCaptcha class:</p>
<pre><code>$captcha_instance = new ReallySimpleCaptcha();
</code></pre>
<p>You can change the instance variables as you wish.</p>
<pre><code>// Change the background color of CAPTCHA image to black
$captcha_instance->bg = array( 0, 0, 0 );
</code></pre>
<p>See really-simple-captcha.php if you are interested in other variables.</p>
<p>Generate a random word for CAPTCHA.</p>
<pre><code>$word = $captcha_instance->generate_random_word();
</code></pre>
<p>Generate an image file and a corresponding text file in the temporary directory.</p>
<pre><code>$prefix = wp_rand();
$captcha_instance->generate_image( $prefix, $word );
</code></pre>
<p>Then, show the image and get an answer from respondent.</p>
<p>Check the correctness of the answer.</p>
<pre><code>$correct = $captcha_instance->check( $prefix, $the_answer_from_respondent );
</code></pre>
<p>If the $correct is true, go ahead. Otherwise, block the respondent — as it would appear not to be human.</p>
<p>And last, remove the temporary image and text files, as they are no longer in use.</p>
<pre><code>$captcha_instance->remove( $prefix );
</code></pre>
<p>That’s all.</p>
<p>If you wish to see a live sample of this, you can try <a href="https://contactform7.com/captcha/" rel="nofollow ugc">Contact Form 7</a>.</p>


Really Simple CAPTCHA

Needed this for an installation with custom forms. I used the plugin developers instructions and was able to make a fully custom implementation based on server side validation within 30 minutes. No more spam bots misusing the forms. Thank you!

Great work - easy to implement

Really Simple CAPTCHA is a CAPTCHA module intended to be called from other plugins. It is originally created for my Contact Form 7 plugin.

WebFactory

<p><a href="https://wploginlockdown.com/" rel="nofollow ugc">Login Lockdown</a> records the IP address and timestamp of failed login attempts. If more than a selected number of attempts are detected within a set period of time from the same IP, then the <strong>login is disabled for all requests from that IP address</strong> (or the IP is completely blocked from accessing the site). This secures the site and helps prevent brute force password attacks & discovery.</p>
<p>The plugin defaults to a 1 hour lock out of an IP block after 3 failed login attempts within 5 minutes. This can be modified in options. Administrators can release locked out IPs manually from the panel. A detailed log is available for all failed login attempts and all IP locks to control lockdown.</p>
<p>Configure the plugin from Settings – Login Lockdown.</p>
<h4>Country blocking (PRO feature)</h4>
<p>Block unwanted countries from accessing the site, or block them from being able to log in. Display a custom message to blocked visitors so they know why they can’t access the site.</p>
<h4>Captcha</h4>
<p>The simplest way to get rid of bots and brute-force password attacks. Choose from 5 different versions – built-in one, two from Google (PRO feature), Cloudflare Turnstile, and hCaptcha (PRO feature). Built-in captcha is GDPR compatible.</p>
<h4>2FA – Two Factor Authentication (PRO feature)</h4>
<p>Provide an extra layer of security without 2FA code generating apps such as Google Authenticator. Even if somebody knows your username & password they won’t be able to log in because it needs to be confirmed by clicking a unique link sent to your email. Since you’re the only one that has access to your inbox, you’ll never get hacked.</p>
<h4>Cloud Protection (PRO feature)</h4>
<p>Manage IP Whitelists and Blacklists in your Login Lockdown Dashboard (a SaaS service for managing all your sites) and apply them to protect all the sites you manage from a single location.</p>
<h4>Temporary Access (PRO feature)</h4>
<p>Give temporary access to other people without giving them a username & password. Set the lifetime of the link and the maximum number of times it can be used to prevent abuse. Access level rights can be any you pick – admin, editor, author…</p>


Login Lockdown & Protection


WP Login Lockdown is free. At one point it did its work discreetly.



It now auto installs a huge widget in the admin dashboard. In the back it covers the entire interface with huge ads. Almost all of the functionality is now pro and is front row and center, with an interface so covered in pro functions it's impossible use the free plugin.



Frankly this kind of simple functionality should not require a pro plugin at all.



A sad example of the slow degradation of the wonderful WordPress developer community into adware and bloatware.



Should mark WP Login Lockdown two stars really, but will leave it at three stars as it could be useful if way trimmed back again.






Free but total adware

Protect, lockdown & secure login form by limiting login attempts from the same IP & banning IPs.

Really Simple CAPTCHA vs Login Lockdown & Protection