ROB (rat out blocker)
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Restrict execution of certain external requests with partial url or even regex to prevent personal data leakage (as example)
With this simple plugin you can restrict extra external requests made with internal WordPress WP_Http class. Just put in the filter rules field what you wish to restrict. One url part or url regex per line. By default, the plugin returns WP_Error answer for restricted requests. But you can put in response your custom response data.
This plugin is available for download for your site.