How to retrieve feed URLs over a local network (private/reserved IP addresses) in ICS Calendar 10.12.2 and later
…function my_http_request_host_is_external($external, $host, $url) { $allowed_hosts = array( ‘mail.example.com’, // Add your allowed hosts to this array ); if (in_array($host, $allowed_hosts)) { $external = true; } return $external; } add_filter(‘http_request_host_is_external’,…