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[SSL] Callout DCV and cert precedence for subdomain setup #26269

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Merged
merged 5 commits into from
Nov 11, 2025
Merged

[SSL] Callout DCV and cert precedence for subdomain setup #26269

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Prompt suggestion after I flagged this page and section
RebeccaTamachiro Nov 4, 2025
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RebeccaTamachiro Nov 5, 2025
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RebeccaTamachiro Nov 5, 2025
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RebeccaTamachiro Nov 5, 2025
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RebeccaTamachiro Nov 11, 2025
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4 changes: 2 additions & 2 deletions src/content/docs/dns/zone-setups/subdomain-setup/setup/index.mdx
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Expand Up @@ -68,9 +68,9 @@ Although the how-to guides in this documentation are focused on both parent doma

## SSL/TLS certificates

If the parent domain's SSL/TLS certificate explicitly lists the delegated subdomain and is created after the subdomain's SSL/TLS own certificate, the parent domain's certificate will take precedence over the subdomain's certificate.
When using subdomain setup, you should consider possible interactions between parent zone and child zone configurations that could impact [SSL/TLS certificates](/ssl/) provisioning.

For instance, if `example.com` [creates an advanced certificate](/ssl/edge-certificates/advanced-certificate-manager/manage-certificates/) that directly lists `docs.example.com`, visitors to `docs.example.com` might see the SSL/TLS certificate for `example.com`.
If a certificate is already active on the child zone for a specific hostname (`subdomain.example.com`), any certificate pack containing that exact hostname in the parent zone (`example.com`) will fail validation.

## Access applications

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