This topic describes how to manage free SSL certificates after they expire.
In most cases, Alibaba Cloud CDN automatically renews free SSL certificates four days before they expire. However, free SSL certificates used by Alibaba Cloud CDN are issued by certificate authorities (CAs). Renewal applications may fail. We recommend that you use SSL Certificates Service to purchase SSL certificates. Paid SSL certificates provide better technical support. For more information, see Purchase an SSL Certificates Service instance.