Cert-Manager
Cert-Manager is a Kubernetes controller that automates issuance, renewal, and management of TLS certificates from multiple certificate authorities. Covers installation, issuers, ACME HTTP-01 and DNS-01 challenges, …
Tls
DNS Encryption
Protocols that encrypt DNS queries and responses: DNS over TLS (DoT), DNS over HTTPS (DoH), and DNS over QUIC (DoQ). Covers transport, ports, RFCs, a protocol comparison, and implementation examples for systemd-resolved, …
OpenSSL
Practical OpenSSL reference covering key generation, CSRs, self-signed certificates, inspection, format conversion, OCSP stapling, Certbot, and x509 client authentication with CRLs.
TLS Handshake
How a client and server negotiate encryption, authenticate, and derive session keys over TLS 1.2 and 1.3. Covers cipher suite negotiation, certificate chain validation, session resumption, and JA3/JA4 fingerprinting.