Validity periods and renewal
For Universal certificates, Cloudflare controls the validity periods and certificate autorities (CAs), making sure that renewal always occur.
Universal certificates issued by Let’s Encrypt or Google Trust Services have a 90 day validity period. Cloudflare no longer uses DigiCert for newly issued Universal certificates and, for existing ones, the validity period is being adjusted from one year to 90 days.
|Certificate validity period||Auto renewal period||Notes|
|1 year||30 days||Soon to be|
|3 months||30 days|
|1 month||7 days||Not supported by|
|2 weeks||3 days||Not supported by|
Benefits of shorter validity periods
Cloudflare only issues certificates with validity periods of three months or less for two reasons.
First, shorter-lived certificates limit the damage from key compromise and mistaken issuance. Any compromised key material will be valid for a shorter period of time.
Second, shorter certificates encourage automation. The more frequently you have to do a task, the more likely you will want to automate it. Automation also means that you are less likely to let a certificate expire in production or give a person access to key material.
Failure to renew and certificate replacement
If a certificate fails to renew and another valid certificate exists for the hostname, Cloudflare will deploy the valid certificate within these last 24 hours.