Sentinel is used for standardizing security protocols within networks, servers, computers, and logical designs to enhance overall security.
Sentinel supports mutual SSL Authentication to provide a local cache of revocation data by implementing the Certificate Revocation List (CRL) feature. CRL helps in blocking a compromised client even when Sentinel is not connected to the Internet to validate the certificate credentials of a revoked client.
CRL is a list of digital certificates that were revoked by the issuing Certificate Authority (CA) before their scheduled expiration date and must no longer be trusted. CRLs are a type of blacklist and are used by various endpoints, including Web browsers, to verify whether a certificate is valid and trustworthy.
This chapter provides information about the following: