Title: Smart Traffic Source Filter for WordPress Author: Medium Interactive Published: October 23, 2025 Last modified: December 18, 2025 --- Search plugins ![](https://ps.w.org/mdi-http-referer-block/assets/banner-772x250-old.jpg?rev=3470899) ![](https://ps.w.org/mdi-http-referer-block/assets/icon-128x128-odl.png?rev=3470899) # Smart Traffic Source Filter for WordPress By [Medium Interactive](https://profiles.wordpress.org/mediuminteractive/) [Download](https://downloads.wordpress.org/plugin/mdi-http-referer-block.1.0.2.zip) * [Details](https://pcd.wordpress.org/plugins/mdi-http-referer-block/#description) * [Reviews](https://pcd.wordpress.org/plugins/mdi-http-referer-block/#reviews) * [Installation](https://pcd.wordpress.org/plugins/mdi-http-referer-block/#installation) * [Development](https://pcd.wordpress.org/plugins/mdi-http-referer-block/#developers) [Support](https://wordpress.org/support/plugin/mdi-http-referer-block/) ## Description Tired of spam form submissions from suspicious referral sources? Want to block or redirect traffic from specific ad networks that send low-quality leads? Managing traffic quality shouldn’t require a developer. We made it easy! Smart Traffic Source Filter gives WordPress site owners complete control over user experience based on traffic origin. By analyzing the HTTP referrer (both server- side via PHP and client-side via JavaScript when headers are missing), this plugin makes it easy to detect where visitors come from and apply different behavior—whether you need to filter spam, protect forms, redirect unwanted traffic, or optimize conversions for high-quality sources. You can define specific referrer domains or patterns, and when a visitor matches those conditions, the plugin can: * Display a small notification (server-side) showing the detected referrer host or path. * Hide or reveal specific elements on your site using CSS selectors. * Redirect visitors from certain sources to a different URL. This gives marketers, advertisers, and site owners fine control over how different audiences see the site. Example use cases: * Hide contact forms when users arrive through syndicated search traffic to prevent spam or low-quality leads. * Hide pricing details when a user comes from social media to encourage engagement before pricing exposure. * Redirect visitors from affiliate networks to a dedicated landing page. * Show a simple banner confirming that the user arrived via a partner campaign. The plugin sets a tracking cookie (`mdi_syndicated_ref`) to remember the detected source for the configured number of days, ensuring consistent visibility rules on repeat visits. MDI HTTP Referer Block helps you tailor on-site experiences dynamically based on real visitor origin — simple, server-side controlled, and privacy-respecting. For a full guide on blocking syndicated search traffic (e.g., Google Ads Performance Max), see: https://mediuminteractive.com/how-to-block-syndicated-search-traffic- from-performance-max-campaigns-in-google-ads/ ## Screenshots * [[ ## Installation 1. Upload the `mdi-http-referer` folder to the `/wp-content/plugins/` directory. 2. Activate the plugin through the ‘Plugins’ screen in WordPress. 3. Configure settings at: Settings HTTP Referer. ## FAQ ### Will this expose the full referrer URL publicly? No. The plugin only outputs host and path in the notification to avoid leaking query parameters. Referrer data is sanitized. ### Does the plugin support regex matching? The client-side code treats configured domain strings as patterns and will try to use them as regex. Keep patterns simple (example: `example\.com` or `partner.example`). ## Reviews There are no reviews for this plugin. ## Contributors & Developers “Smart Traffic Source Filter for WordPress” is open source software. The following people have contributed to this plugin. Contributors * [ Medium Interactive ](https://profiles.wordpress.org/mediuminteractive/) [Translate “Smart Traffic Source Filter for WordPress” into your language.](https://translate.wordpress.org/projects/wp-plugins/mdi-http-referer-block) ### Interested in development? [Browse the code](https://plugins.trac.wordpress.org/browser/mdi-http-referer-block/), check out the [SVN repository](https://plugins.svn.wordpress.org/mdi-http-referer-block/), or subscribe to the [development log](https://plugins.trac.wordpress.org/log/mdi-http-referer-block/) by [RSS](https://plugins.trac.wordpress.org/log/mdi-http-referer-block/?limit=100&mode=stop_on_copy&format=rss). ## Changelog #### 1.0 * Initial public release. #### 1.0.1 * Update assets #### 1.0.2 * Update assets ## Meta * Version **1.0** * Last updated **4 months ago** * Active installations **Fewer than 10** * WordPress version ** 5.6 or higher ** * Tested up to **6.9.4** * Language * [English (US)](https://wordpress.org/plugins/mdi-http-referer-block/) * Tags * [cookie](https://pcd.wordpress.org/plugins/tags/cookie/)[hide content](https://pcd.wordpress.org/plugins/tags/hide-content/) [redirect](https://pcd.wordpress.org/plugins/tags/redirect/)[referer](https://pcd.wordpress.org/plugins/tags/referer/) [referrer](https://pcd.wordpress.org/plugins/tags/referrer/) * [Advanced View](https://pcd.wordpress.org/plugins/mdi-http-referer-block/advanced/) ## Ratings No reviews have been submitted yet. [Add my review](https://wordpress.org/support/plugin/mdi-http-referer-block/reviews/#new-post) [See all reviews](https://wordpress.org/support/plugin/mdi-http-referer-block/reviews/) ## Contributors * [ Medium Interactive ](https://profiles.wordpress.org/mediuminteractive/) ## Support Got something to say? Need help? [View support forum](https://wordpress.org/support/plugin/mdi-http-referer-block/)