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When you enable CDN Acceleration on Bunny DNS, bunny.net automatically registers your domain with Bunny CDN, enables a secure proxy to your origin, and configures an SSL certificate for the accelerated hostname. If you see an SSL error after enabling CDN Acceleration, one of the following is usually the cause.

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DNS configuration issues

Bunny.net uses Let’s Encrypt to issue SSL certificates. Let’s Encrypt validates ownership by contacting our system before issuing a certificate, so if your domain is not yet pointing its nameservers to bunny.net when the certificate is requested, issuance will fail. To resolve this:
  1. Confirm your domain is pointing to bunny.net nameservers (typically kiki.bunny.net and coco.bunny.net).
  2. Confirm the DNS record is correctly configured.
  3. Wait for the nameserver change to propagate. This can take up to 24 hours.
Keep CDN Acceleration disabled until the nameserver change has fully propagated.
If you enabled CDN Acceleration before propagation completed, you can manually request the certificate from the connected Pull Zone’s settings.

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Configuration delay

Once a DNS record is accelerated, bunny.net immediately configures the HTTP domain across our global network and begins issuing the SSL certificate. The process usually completes within seconds but can occasionally take a few minutes. During this window, your domain remains reachable but may not respond correctly to HTTPS requests. The certificate will be issued after a series of retries, so wait a few minutes before investigating further.

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Still stuck?

If you’ve followed the steps above and your accelerated domain is still unreachable over HTTPS, reach out to our Super Bunnies for further help.
Last modified on May 19, 2026