ssl-certificates

Let's Encrypt, certbot, auto-renewal, wildcard DNS challenge, SSL troubleshooting with Cloudflare proxy

SKILL.md

GitHub

Skill: SSL Certificates — Let's Encrypt + Cloudflare

Quando Usar

  • Certificado expirado ou prestes a expirar em qualquer domínio do servidor
  • Novo domínio/subdomínio precisa de HTTPS (ex: novo preview, novo projeto)
  • Renovação automática parou de funcionar (certbot renew falhando)
  • Nginx retornando erro SSL (handshake fail, mixed content, HSTS problem)

Contexto

Domínios ativos neste servidor:

Domínio Proxy CF Tipo Cert
api.myapp.example.com, frontend.example.com ✅ Standard
myapp.example.com, www. ✅ Standard
work8.example.com ✅ Standard
portfolio.example.com ✅ Standard
neuralnets.example.com ✅ Standard
app.portfolio.example.com ✅ Standard
*.preview.myapp.example.com ✅ Wildcard DNS-01

Paths críticos:

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