huygens-25

<p>OpenPorte is a community-maintained fork of the ALTCHA Spam Protection<br />
plugin for WordPress (version 1), which provides a free, open source,<br />
self-hostable, privacy-friendly CAPTCHA alternative based on a proof-<br />
of-work mechanism — no cookies, no tracking, GDPR-friendly by design.</p>
<p>For the list of contributors, refer to our GitHub project: <a href="https://github.com/jcberthon/openporte/graphs/contributors?from=1.6.2024" rel="nofollow ugc">Contributors</a>.</p>
<h4>Background</h4>
<p>The original ALTCHA WordPress plugin (v1) was open source (GPLv2). Its<br />
authors have since released a version 2/3 which is no longer open source,<br />
and some features that were free in v1 are now paid. They no longer<br />
maintain v1 and recommend that users migrate to v2/v3. See the official<br />
project at https://altcha.org for their offering.</p>
<p>OpenPorte continues the v1 line as free software (GPLv2 or later) for users<br />
who want to stay on a fully open-source, self-hosted solution. It is a<br />
faithful fork: existing v1 installations can switch to OpenPorte and keep<br />
their settings (see Upgrading).</p>
<h4>Compatibility</h4>
<p>OpenPorte is backward-compatible with ALTCHA v1:</p>
<ul>
<li>Your existing settings are migrated automatically on activation.</li>
<li>The <code>[altcha]</code> shortcode keeps working (alongside the new <code>[openporte]</code>).</li>
<li>The <code>altcha_*</code> filters and actions keep firing as deprecated aliases.</li>
</ul>
<p>See the Deprecations section for the full list of compatibility aliases and<br />
what they map to.</p>
<h3>Upgrading</h3>
<h4>From the original ALTCHA v1 plugin</h4>
<p>Deactivate the old ALTCHA plugin, then install and activate OpenPorte. Your<br />
existing configuration is detected and copied into the OpenPorte settings on<br />
first activation; the original ALTCHA settings are left untouched, so you can<br />
roll back to ALTCHA v1 without losing anything. Do not run both plugins at the<br />
same time.</p>
<h3>Deprecations</h3>
<p>The following ALTCHA-era identifiers are kept as aliases for backward<br />
compatibility and are scheduled for removal in a future release:</p>
<ul>
<li>The <code>[altcha]</code> shortcode — use <code>[openporte]</code>.</li>
<li>The <code>altcha/v1</code> REST namespace — use <code>openporte/v1</code>.</li>
<li>The <code>altcha_*</code> filters and actions — now firing through WordPress’ deprecated<br />
hook mechanism; use the <code>openporte_*</code> equivalents.</li>
<li>The <code>AltchaPlugin</code> class and the <code>ALTCHA_VERSION</code> / <code>ALTCHA_WIDGET_VERSION</code><br />
constants — use <code>OpenPortePlugin</code> and the <code>OPENPORTE_*</code> constants.</li>
<li>Integrations targeting paid-only third-party plugins; affected users should<br />
migrate to the official ALTCHA v2/v3 plugin.</li>
</ul>
<h3>Privacy</h3>
<h4>No cookies, no tracking</h4>
<p>OpenPorte prioritizes user privacy by avoiding the use of cookies and fingerprinting techniques.</p>
<h4>No external service</h4>
<p>This plugin remains fully contained within your WordPress installation, eliminating any reliance on external services.</p>
<h3>Modes of Operation</h3>
<p>OpenPorte verifies submissions in one of two modes, selected in the settings<br />
(API Mode):</p>
<ul>
<li>Self-hosted (default) — a proof-of-work challenge is issued and verified by<br />
your own WordPress site through the REST API. Fully self-contained, with no<br />
external service and no additional setup beyond enabling the integrations you<br />
need.</li>
<li>Custom — point the Challenge URL at your own ALTCHA-compatible backend (for<br />
example a self-hosted ALTCHA Sentinel). Submissions are verified with your<br />
site’s signing secret.</li>
</ul>
<p>The paid altcha.org regional SaaS classifier offered by earlier versions has<br />
been removed; both remaining modes are free and self-hostable.</p>
<h3>REST API</h3>
<p>This plugin requires the WordPress REST API. If you are using any “Disable REST API” plugins, ensure that the endpoint <code>/altcha/v1/challenge</code> (marked for deprecation) and <code>/openporte/v1/challenge</code> are allowed.</p>
<h3>Supported Integrations</h3>
<ul>
<li>CoBlocks</li>
<li>Contact Form 7</li>
<li>Elementor Pro Forms (deprecated — paid plugin, see Deprecations)</li>
<li>Formidable Forms</li>
<li>Forminator</li>
<li>GravityForms</li>
<li>HTML Forms</li>
<li>WPDiscuz</li>
<li>WPForms</li>
<li>WP-Members</li>
<li>WordPress Login, Register, Password reset</li>
<li>WordPress Comments</li>
<li>WooCommerce</li>
<li>Custom HTML (via the <code>[openporte]</code> shortcode, or the deprecated <code>[altcha]</code> alias)</li>
</ul>
<h3>Source Code</h3>
<p>All source code for the plugin, and the ALTCHA widget is available on GitHub. In the repository, you’ll also find versions of non-minified JavaScript and CSS assets:</p>
<ul>
<li>Plugin: https://github.com/jcberthon/openporte</li>
<li>ALTCHA Widget: https://github.com/altcha-org/altcha</li>
</ul>


OpenPorte Spam Protection

OpenPorte offers a free, open-source Captcha alternative, ensuring robust spam protection while respecting user privacy and GDPR compliance.

edwardw

<p>This plugin is just a very effective yet simple plugin which adds a question to the comment form that blocks most automated spam-bots by making them answer a common sense question. For optimal effectiveness, you should add multiple questions so that the spambots can’t “memorize” the question and answer. The plugin will display questions at random to prevent the aformentioned memorization. Multiple answers can be added per question to account for variances in answers. (e.g. “five”, “Five”, “5”)</p>
<p>Plugin homepage: http://www.compdigitec.com/apps/wpnobot</p>
<p>Please drop a <a href="http://www.compdigitec.com/labs/2011/10/09/wp-no-bot-question-plugin-for-wordpress/" title="WP No-bot Question plugin for WordPress" rel="nofollow ugc">comment</a> if it works for you, if you found any bugs or if you have suggestions/ideas for this plugin – complaints welcome!</p>


WP No-Bot Question

Simple question that blocks most spambots (and paid robots) by making them answer a common sense question

OpenPorte Spam Protection vs WP No-Bot Question