How can I fix the "This site can’t provide a secure connection" error I get after setting a custom domain in Azure Static Web Apps?

Question

I follow the instructions here: https://learn.microsoft.com/en-us/azure/static-web-apps/custom-domain-external

Domain validated (www and root domain). But still cant access site. https://hsnyc.co

It shows the following error:

This site can’t provide a secure connection 
hsnyc.co
ERR_SSL_VERSION_OR_CIPHER_MISMATCH

More details:
Unsupported protocol
The client and server don't support a common SSL protocol version or cipher suite.

Is there a problem with the SSL cert? How do I troubleshoot cert related issues in Azure? and How can I check the status of the SSL cert?

Thank you.

Answer 1

SWA managed certificate automatically provides this TLS/SSL server certificate its fully managed and is automatically renewed continuously in six-month increments, 45 days before expiration.

As I can see in your Site now it is using SSL its just intially binding was taking time.

Please "Accept as Answer" if this helps

Answer 2

After some troubleshooting I discovered an A record in my registrar DNS settings that was still pointing to my old host. This was causing the error with the domain. After deleting this record the SSL cert error stopped.

Thank you both for your assistance.

Answer 3

@Henry S Thanks for reaching here! There was similar issue previously on GitHub

After diving further into this, it turns out that the ISP had blocked the domain due to phishing concerns.
If you are hitting SSL_PROTOCOL_ERROR or hitting DNS issues when reaching the default hostname of your SWA, you may need to contact your ISP to allowlist your domain as they may have incorrectly flagged it.

Let us know if issue remains.