Fix · nginx
Fix “Signed DNS (DNSSEC)” on nginx
Enable DNSSEC at your DNS host / domain registrar.
No server-level snippet for this control on nginx; apply the guidance below.
Verify the fix
Re-run the Signed DNS (DNSSEC) check after deploying. Test config changes in staging first and keep a rollback: a wrong header can break a site faster than a missing one.
Other stacks: Apache · Caddy · Express / Node · Cloudflare