# References

For information about digital certificates, see the following references:

- RFC 2409—The Internet Key Exchange (IKE) (November 1998)
- RFC 2459—Internet X.509 Public Key Infrastructure Certificate and CRL Profile (January 1999)
- RFC 2986—PKCS #10: Certification Request Syntax Specification Version 1.7 (November 2000)
- RFC 3280—Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile (April 2002)
- RFC 3447—Public-Key Cryptography Standards (PKCS) #1: RSA Cryptography Specifications Version 2.1 (February 2003)

For more information about IPSec and IKE, see Configuring IPSec.