Is it possible to use a custom SSL certificate just for a specific domain, and use the autogenerated one for all other domains on the same project?
If the custom certificate SAN/CN matches the custom specific domain, the custom certificate is preferred over autogenerated Let’s Encrypt certificates.
One exception is at the end of the custom certificate validity, where a Let’s Encrypt certificate is generated in the background to replace the custom certificate if it isn’t renewed.
If a wildcard custom certificate is upload, it will always be preferred for all domains matching the wildcard SAN/CN and not only a specific subdomain under the wildcard.
2 Likes