Red Hat CERTIFICATE SYSTEM 7.2 - ADMINISTRATION Administration Manual page 226

Chapter 10. Managing Certificates
Figure 10.7. Setting the Validity Period
The default validity period is five years.
12. Only when requesting a certificate through the Certificate Manager Console submitting the request
to the Certificate Manager automatically. Set the standard extensions for the certificate. The
required extensions are chosen by default. To change the default choices, read the guidelines
Appendix A, Certificate and CRL
explained in
206
Extensions.