Certbot renewals fail on broken dynamic-DNS nameservers
Certbot renewals fail because the certificate's domain has broken DNS nameservers returning NXDOMAIN and SERVFAIL.
Tier II · Emerging Problems that are still building up.
4 public reports · first reported 27 September 2026 · last reported 28 September 2026
What's going wrong
Automatic certificate renewals with Certbot can stop working when the domain behind them has faulty DNS.
AI-assisted: written with the help of AI from the reports. The idea report has the full summary.
In the idea report
- The full summary.
- The products the 4 reports are about, and how many came each month.
- Related problems.
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