Page Rule for Permanent redirection not working

[user14808]

Hi,

I want to redirect www.subdomain.domain.com to https://subdomain.domain.com.
I have A record for subdomain.domain.com (not proxied) and CNAME record for www.subdomain (proxied) in place.

A page rule was also set to redirect (301 permanent redirection)

This setup was working fine up until yesterday.
Now I am getting the error SSL Cipher Mismatch Error, but no changes were made to the settings.
Kindly let me know how to troubleshoot/fix this issue.

Thanks in advance.

[erictung]

@user14808

was working fine

I can’t understand why it was working fine.

As you are using two-level subdomains, you should always get Cipher Mismatch error with proxy mode on unless you have a valid SSL certificate for www.subdomain.domain.com.

Subdomain too deep

This tutorial covers a possible reason for the SSL_ERROR_NO_CYPHER_OVERLAP and ERR_SSL_VERSION_OR_CIPHER_MISMATCH errors (Firefox and Chrome respectively) when seen on a subdomain. The Cloudflare universal certificates cover example.com and *.example.com. This means that it covers any subdomain one level below the domain you signed up with. It will cover www.example.com and subdomain.example.com, as these are one level below the root domain, example.com. The certificate will not cover www.sub…