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SSL/TLS certificates are the baseline of internet security, and certificate management done poorly leads to outages — expired certificates that take down production sites, weak cipher configurations that fail compliance audits, or mixed-content warnings that erode user trust. Hellenic Technologies manages the full certificate lifecycle for every domain and subdomain in client environments, ensuring certificates are always valid, renewed automatically, and configured to current security standards. Let’s Encrypt provides free, 90-day certificates that are renewed automatically via certbot or the ACME protocol. We configure automatic renewal with pre-renewal hooks that reload services (Nginx, HAProxy) gracefully, post-renewal hooks that push new certificates to load balancers or CDN, and monitoring alerts that fire at 30 and 7 days before expiry as a backstop. For wildcard certificates and environments using Cloudflare, we use DNS-01 challenges that don’t require a publicly accessible webserver. Cloudflare Origin Certificates are issued directly by Cloudflare’s CA and are valid for up to 15 years. Combined with Full (Strict) SSL mode in Cloudflare, they ensure end-to-end encryption from user browser to Cloudflare edge to origin server, with certificate validation at both hops. For internal services and mutual TLS (mTLS) scenarios, we provision certificates from a private CA using HashiCorp Vault PKI Secrets Engine, enabling automated certificate rotation without external CA dependencies. SSL/TLS management services:
  • Let’s Encrypt certificate provisioning with automatic renewal via certbot/acme.sh
  • Cloudflare Origin Certificate setup with Full (Strict) SSL mode configuration
  • Wildcard certificate management via DNS-01 ACME challenges
  • Certificate monitoring with expiry alerts at 30 and 7 days
  • TLS configuration hardening: TLS 1.2/1.3 only, strong cipher suites, HSTS
  • Mutual TLS (mTLS) setup for API-to-API authentication
  • Private PKI setup with HashiCorp Vault PKI Secrets Engine
  • OCSP stapling configuration for improved TLS handshake performance
  • SSL Labs A+ grade configuration and periodic re-validation
  • Certificate inventory and renewal runbook documentation