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Security Medium impact Medium depends on the state

DNS & SSL certificate

Correct DNS records and a valid SSL certificate.

What it is

DNS translates the domain to the server; the SSL certificate provides HTTPS. The check covers the validity and correctness of the certificate, DNS records, and email protections (SPF, DMARC).

Why it matters

An expired or misconfigured certificate shows visitors a security warning and deters them. Missing SPF/DMARC lets scammers send emails in your domain's name (phishing).

How to do it

  1. 1Watch the SSL certificate's validity and automatic renewal (Let's Encrypt).
  2. 2Verify that the certificate covers both the domain and the www variant and that the whole chain is correct.
  3. 3Set up SPF and DMARC records to protect email.
  4. 4Check the correctness of A/CNAME records.

Conclusion

DNS and SSL are the site's "plumbing" foundation — when they work, you don't see them; when they don't, there's an immediate problem. The main thing is automatic certificate renewal and configured SPF/DMARC. It pays to watch the certificate's expiration in advance.

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