tomroyal

This is a simple plugin designed to cut down on automated spam registrations and the emails they produce.
The idea is simple: in order to register, users have to answer a question that’s simple for anyone reading your blog, but impossible for a script being run by a spammer.
To install, simply copy stop_registration_spam.php to your Plugins directory. Enable the plugin and an options page will appear under the WordPress Settings menu.
In the settings page, enter your question (keep it short), answer (ideally very short) and a hint to display if the user gets it wrong. Save these and they’ll be used for new registrations.
I’ve been using this plugin for a few months, and it cut spam from dozens a day to none at all. Hope you find it useful. Questions etc welcome on my blog:
http://www.tomroyal.com/blog/2012/04/09/stop-wordpress-registration-spam/
Tom

Stop Registration Spam

Stops spammy automated user registrations using a custom question.

Marcel Pol

Django

Bonaldi

delanthear

Barry

ntodo

misterpo

lamachinedigitale

grynge

Feel safe knowing that your website is safe from spam. La Sentinelle will guard your WordPress website against spam in a simple and effective way. 
It has antispam filters for comment forms and registration forms and can be extended to support plugins. 
The default settings should catch most spambots, and there is a settingspage to set it up according to your wishes.
Current features include:
<ul>
<li>3 antispam features; Honeypot, Nonce, Form Timeout.</li>
<li>These 3 spamfilters depend on JavaScript on the frontend.</li>
<li>1 antispam feature; <a href="https://www.stopforumspam.com" rel="nofollow ugc">Stop Forum Spam</a>.</li>
<li>Settingspage to set things up according to your wishes.</li>
<li>Transparent to the visitor, no nagging with Captcha’s or other annoying things.</li>
<li>By default no use of third-party services and no tracking of visitors.</li>
<li>Lightweight and simple code.</li>
<li>Logging for WordPress Comments and which spamfilter marked it as spam.</li>
<li>Logging for Custom forms and which spamfilter marked it as spam.</li>
<li>Statistics for every form how many spam submissions were blocked.</li>
</ul>
WordPress forms that are protected:
<ul>
<li>WordPress Comments form.</li>
<li>WordPress Login form.</li>
<li>WordPress Register form.</li>
<li>WordPress Lost Password form.</li>
</ul>
Form Plugins that are protected:
<ul>
<li><a href="https://wordpress.org/plugins/caldera-forms/" rel="ugc">Caldera Forms</a>.</li>
<li><a href="https://wordpress.org/plugins/clean-login/" rel="ugc">Clean Login</a> (Login form).</li>
<li><a href="https://wordpress.org/plugins/contact-form-7/" rel="ugc">Contact Form 7</a>.</li>
<li><a href="https://wordpress.org/plugins/easy-digital-downloads/" rel="ugc">Easy Digital Downloads</a> (Login form, Register form).</li>
<li><a href="https://wordpress.org/plugins/everest-forms/" rel="ugc">Everest Forms</a>.</li>
<li><a href="https://wordpress.org/plugins/formidable/" rel="ugc">Formidable Form Builder</a>.</li>
<li><a href="https://wordpress.org/plugins/forminator/" rel="ugc">Forminator</a>.</li>
<li><a href="https://wordpress.org/plugins/newsletter-optin-box/" rel="ugc">Newsletter Optin Box plugin (noptin)</a> (standalone forms).</li>
<li><a href="https://wordpress.org/plugins/ultimate-member/" rel="ugc">Ultimate Member</a> (Login form, Register form and Lost Password form).</li>
<li><a href="https://wordpress.org/plugins/woocommerce/" rel="ugc">WooCommerce</a> (Login form, Lost Password form).</li>
<li><a href="https://wordpress.org/plugins/wpforms-lite/" rel="ugc">WPForms Lite</a>.</li>
<li><a href="https://wordpress.org/plugins/wp-job-manager/" rel="ugc">WP Job Manager plugin</a> (submit job form when registering is enabled).</li>
</ul>
<h4>Support</h4>
If you have a problem or a feature request, please post it on the plugin’s support forum on <a href="https://wordpress.org/support/plugin/la-sentinelle-antispam" rel="ugc">wordpress.org</a>. I will do my best to respond as soon as possible.
If you send me an email, I will not reply. Please use the support forum.
<h4>Translations</h4>
Translations can be added very easily through <a href="https://translate.wordpress.org/projects/wp-plugins/la-sentinelle-antispam" rel="nofollow ugc">GlotPress</a>. 
You can start translating strings there for your locale. They need to be validated though, so if there’s no validator yet, and you want to apply for being validator (PTE), please post it on the support forum. 
I will make a request on make/polyglots to have you added as validator for this plugin/locale.
<h4>How to choose an antispam plugin</h4>
When you look through the WordPress Plugin Repository you will see more than a hundred antispam plugins. 
Which one is the best one? Short answer, there is no “best one”. No spamfilter and no method for spamfiltering is perfect. 
Slightly longer answer, you could try about twenty and choose the one that fits your needs best.
But there is also a really long answer. 
There are different methods that can be used against spam, and every method has its drawbacks. 
In my opinion, having a low number of false positives is more important than perfectly marking all spam, you don’t want to miss out on important people or information. Nagging the user in some way has a similar effect, the user might not even want to bother with that and just walk away.
<ul>
<li>Third party services: Services like Akismet, OOPSpam, Stop Forum Spam and also reCAPTCHA offer third party services to check for spam. This can be very effective, but you are giving user submitted data away to these third parties and are also giving your users up for tracking them.</li>
<li>Captcha’s, reCAPTCHA and Quizz Questions: You are annoying your users and probably sending some of them away. This especially counts for reCAPTCHA for visitors who have third party cookies disabled.</li>
<li>Blacklists: Often running behind the facts. That goes for the way of getting users off that list, and also in getting users on that list.</li>
<li>Referer check: check if the Referer header is set correctly. You can never trust it is set correctly. Modern browsers are limiting the use of Referers, though for now that is mostly for third-party domains.</li>
<li>JavaScript methods: Spammers often (always?) don’t use JavaScript, they just post the form with spammy data. Drawback for this method is that statistics say that about 1 percent of users has JavaScript disabled. Also, some websites have broken JavaScript, which might make the spamfilter break as well.</li>
<li>Activation email for registering users. Users only get activated after clicking a link in an activation email. You still have all the non-activated users in your site however.</li>
</ul>
You could have a bright idea about combining several methods, but then you get the drawbacks of all the methods you use.
Another complication of choosing a good plugin is that most antispam plugins don’t tell you what methods they use. The documentation doesn’t tell you, and looking at the source code just leaves you confused at the chaos that it often is.
My main motivation for writing this plugin is to offer a plugin that does spamfiltering with JavaScript methods in a simple and effective way. 
The claimed 1 percent of users that has JavaScript disabled will also be tech-savy enough to enable it again for your website.
<h4>Compatibility</h4>
This plugin is compatible with <a href="https://www.classicpress.net" rel="nofollow ugc">ClassicPress</a>.
<h4>Contributions</h4>
This plugin is also available in <a href="https://codeberg.org/cyclotouriste/la-sentinelle-antispam" rel="nofollow ugc">Codeberg</a>.

La Sentinelle antispam


Hello, I found that starting from version 2.4.5, the input in the .la-sentinelle-container will be displayed because the old version contained CSS with display: none, which is no longer present in the new version. This will result in a large blank space and unnecessary fields below the comment section of all articles.


This is a convenient plugin, but there are some issues that have been discovered


Great work, I tested it on 2 of my sites that were attracting thousands of spam comments and it worked great, there is an option to save the comments in a spam folder for you to look at later as well as delete them directly. Congratulations on a job well done.


Great work


I've been using this plugin for a couple of months now, I have also used other plugins from the same author as well. He has made a simple but yet very effective way to combat the form spam, I use contact form 7 and it integrates with that super easy. The spam has been 100% correct  with no false positives. You can collect the spam if you want to double check but depending on your site that could be an endless job with the amount of spam some of my sites collect. I've been able to monitor real contacts from the forms, and I can only say that the spam that has come through has been delivered by hand and not via  bot system. 


Easy to use and quite effective


Within a few days of launching a new site, it became painfully obvious that we needed better protection for our contact form.



We looked at a few options such as captchas however these all required third-party scripts and cookies.



After a few weeks I'm happy to report that the plugin has blocked over 1000 spam submissions !


very effective

Feel safe knowing that your website is safe from spam. La Sentinelle will guard your WordPress website against spam in a simple and effective way.

Stop Registration Spam vs La Sentinelle antispam