ERR_CONNECTION_CLOSED - subdomains

Hello,

we have some DNS records of subdomains, which are not reachable.

Like A.B.C.domain.TLD doesn’t work, but C.domain.TLD works. The settings and the destination ip are the same. On the destination server, the domains are created.
Last week, the first named domain was reachable with the same settings on cloudflare and our server.

Can you please check it?
Thank you very much.

Best regards,
Flo

What error do you get?

Could it be that it is too deep a subdomain for the Cloudflare universal SSL , it covers *.example.com but not *.*.example.com , i.e. it covers a.example.com but not a.b.example.com ?

Edit:
Sorry, didn’t see the error message was in the topic title. Are you able to share the domain and subdomain(s) that won’t work? Still think it might be the above though :slightly_smiling_face:

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.