Guides
Short, honest notes. One question per page.
- Why Certbot did not renew Timer, nginx reload, mixed chain, DNS-01, account key, staging CA, disk.
- CT log vs live handshake Certificate Transparency shows issuance, not what the balancer is serving.
- Certificate expiry alert schedule 30 / 7 / 1 days versus a single email a week out.
- 100-day TLS certificates 200 days now, 100 days from March 2027, 47 days from March 2029.
- SSL monitoring for agencies A portfolio of hostnames, not an uptime tool.
- Self-hosted SSL monitoring with Docker One compose file, SQLite, AGPL — and the managed option if you do not want ops.