Certificate	Critical	Usages
Comodo DV	✗	serverAuth, clientAuth
Comodo EV	✗	serverAuth, clientAuth
DigiCert HA Intermediate	✗	serverAuth, clientAuth
DigiCert Secure Server	✗	serverAuth, clientAuth
GlobalSign DV	✗	serverAuth, clientAuth
Go Daddy G2 Intermediate	✗	serverAuth, clientAuth
Google G3	✗	serverAuth
Let’s Encrypt X1	✗	serverAuth, clientAuth
Let’s Encrypt X3	✗	serverAuth, clientAuth
RapidSSL G3	✗	serverAuth, clientAuth
StartSSL class 2	✗	clientAuth, serverAuth
StartSSL class 3	✗	clientAuth, serverAuth
TrustID Server A52	✗	serverAuth, clientAuth