ERR_SSL_PROTOCOL_ERROR with Netlify DNS

Support
1

Hello,

I’m experiencing an intermittent SSL issue with my website:

The domain is using Netlify DNS (nameservers were changed to Netlify), and the SSL certificate was successfully provisioned by Let’s Encrypt.

However, the behavior is inconsistent:

  • Some users can access the website normally.
  • Other users receive ERR_SSL_PROTOCOL_ERROR or Safari reports that it cannot establish a secure connection.
  • The issue occurs across different devices, browsers and networks.

What I’ve already verified:

  • Netlify DNS is active.
  • The SSL certificate appears as active in the Netlify dashboard.
  • The nameservers point to Netlify.
  • Browser cache has been ruled out.
  • The issue is reproducible on multiple devices.

I also tested the domain using SSL Labs. One edge IP passes successfully, while another fails:

75.2.60.5 → A+
99.83.190.102 → Failed to communicate with the secure server

Since I’m using Netlify DNS, I have not manually configured any A records.

Could you please check whether the SSL certificate has been correctly deployed to all Netlify edge servers, or if there is an issue affecting one of the edge nodes?

Thank you very much.