Invalid response from

Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. https://crt.sh/?q=example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain is:uzsi.cz

I ran this command:Cisco Expressway CSR signed

It produced this output:Invalid response from www.uzsi.cz

My web server is (include version):

The operating system my web server runs on is (include version):

My hosting provider, if applicable, is:

I can login to a root shell on my machine (yes or no, or I don’t know):no

I’m using a control panel to manage my site (no, or provide the name and version of the control panel):

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you’re using Certbot):

Hi @danielak

I don't know how that client works.

Is there an update? Or a better protocol?

Checking your domain there are ipv4 and ipv6. But both are configured, with the same answer ( https://check-your-website.server-daten.de/?q=uzsi.cz ).

So it's not an ipv6-problem.

http://uzsi.cz/.well-known/acme-challenge/random-filename

is redirected to https + www.

Perhaps that's a problem:

https://www.uzsi.cz/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de

is redirected to

https://www.uzsi.cz/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de/

so a slash is added. May be that breaks the validation.

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