Tag: wildcard
All PKI knowledge base pages tagged with "wildcard".
- Certbot DNS-01 Challenge: Wildcard Certificates & TXT Record Setup (2026) — Complete DNS-01 guide for Certbot: wildcard + multi-domain certs, exact _acme-challenge TXT record setup, rate-limit fixes, credential security, and troubleshooting that actually works in production.
- Wildcard Certificates: Security Risks, Scope Creep & Alternatives — Why wildcard TLS/SSL certificates create security vulnerabilities — shared keys, scope creep, fleet-wide revocation — and how SAN or per-service certs with ACME and DNS-01 automation reduce risk.