How to Fix “413 Content Too Large” Error in DirectAdmin (ModSecurity)
Introduction On DirectAdmin servers, a 413 Content Too Large error may occur when users attempt to upload files or save large posts/pages in applications like WordPress.This issue is commonly triggered by ModSecurity request body limits, not PHP’s upload/post size or Apache itself. By default, ModSecurity sets a very low SecRequestBodyNoFilesLimit (128 KB), which can block large JSON requests