SSL Issue on Subdomain

[carmargut]

I’m experiencing an issue with the SSL certificate for my subdomain auth.tailorletter.com, which is configured as an alias for my primary site on Netlify (tailorletter.com).

What I’ve Tried So Far:

1. I configured a CNAME record in Netlify DNS pointing auth.tailorletter.com to tailorletter.netlify.app.

2. I attempted to renew the SSL certificate via the HTTPS/SSL section in the Netlify dashboard.

3. I verified that the Let’s Encrypt certificate covers *.tailorletter.com.

4. I’ve performed multiple deployments with adjustments in the netlify.toml file.

Specific Errors:

• When accessing https://auth.tailorletter.com, I encounter the error:
  SSL handshake failed: error:1404B410:SSL routines:ST_CONNECT:sslv3 alert handshake failure
• Browsers display messages such as
  • Safari: “Cannot establish a secure connection
  • Chrome: “The server returned an invalid response.”

Diagnostic Results from Commands:

• OpenSSL Command:

  echo | openssl s_client -showcerts -servername auth.tailorletter.com -connect auth.tailorletter.com:443
  

  • Result:

  no peer certificate available
  SSL handshake has read 7 bytes and written 329 bytes
  

• CURL Command:

  curl -v https://auth.tailorletter.com
  

  • Result:
    SSL routines:ST_CONNECT:sslv3 alert handshake failure

Current Configuration:

• Primary Site: https://tailorletter.com (SSL works correctly).

• Affected Subdomain: https://auth.tailorletter.com (SSL handshake fails).

• DNS Settings:

• auth.tailorletter.com → CNAME → tailorletter.netlify.app

• Proxy in netlify.toml: Traffic for /auth/* is correctly redirected to Supabase (https://supabasealias.supabase.co).

I’m looking forward to your assistance in resolving this issue. Thank you in advance for your help!

[hrishikesh]

It seems to be working fine to me.

In any case, you should not be adding the ALIAs record yourself. Delete that, remove the domain from your site settings an re-add it.