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SSL Best Practices

Practical baseline guidance for certificate hygiene, protocol posture, renewal planning, and operational ownership.

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Certificate Hygiene

Track every production hostname, subdomain, and certificate owner.
Use certificates with complete SAN coverage for all active hostnames.
Keep intermediate chains complete and served in the correct order.
Renew certificates before the final 30-day window whenever possible.

TLS Configuration

Prefer TLS 1.3 and TLS 1.2; disable SSL, TLS 1.0, and TLS 1.1.
Use strong cipher suites and forward secrecy.
Enable HSTS only after validating HTTPS is stable across all required hosts.
Review grades after server, CDN, or certificate authority changes.

Monitoring Operations

Monitor critical domains on a daily schedule.
Send alerts to an owned group inbox rather than a single employee.
Review expiry, grade changes, and vulnerability alerts as separate signals.
Document renewal ownership and escalation paths for each domain group.

Audit Readiness

Export SSL posture evidence before and after material infrastructure changes.
Keep renewal records with issuer, serial number, validity dates, and reviewer notes.
Use recurring checks to prove certificates are actively managed.
Keep failed checks and remediations attached to support or incident records.