Certificateupdate from an existing Certificate

I thought you opened both ports 443 and 80?
Yes, for HTTP-01 challenge port 80 needs to be open.

Just to be sure: the domain name used for the certificate need to be resolvable in public DNS and point to your public IP.

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that was the problem i was wrong because i thought it needs only the 443 Port opened. now it worked. thank you guys

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