Monitor certificate expiration dates
Monitor certificate revocation status
Monitor TLS handshake success and failure rates
Monitor protocol versions in use
Monitor cipher suites in use
Monitor server-side TLS configuration changes
Monitor client-side TLS compatibility issues
Monitor certificate chain validity
Monitor hostname and SAN mismatches
Monitor weak or deprecated TLS versions
Monitor weak or deprecated cipher suites
Monitor unexpected certificate changes
Monitor certificate issuer changes
Monitor key usage and extended key usage settings
Monitor OCSP and CRL availability
Monitor TLS renegotiation activity
Monitor session resumption behavior
Monitor mutual TLS authentication failures
Monitor traffic for plaintext fallback
Monitor logs for TLS-related errors
Monitor alerts from certificate management systems
Monitor compliance against TLS policy baselines
Monitor external endpoints with synthetic TLS checks
Monitor internal services with periodic TLS probes
Monitor certificate transparency logs
Monitor private key access events
Monitor TLS termination points and load balancers
Monitor SNI routing behavior
Monitor certificate deployment success across environments
Monitor latency introduced by TLS handshakes
Monitor anomalous spikes in TLS errors