To fix these errors, please make sure that your domain name was
entered correctly and the DNS A/AAAA record(s) for that domain
contain(s) the right IP address. Additionally, please check that
your computer has a publicly routable IP address and that no
firewalls are preventing the server from communicating with the
client. If you're using the webroot plugin, you should also verify
that you are serving files from the webroot path you provided.
My web server is (include version): Apache/2.4.25
The operating system my web server runs on is (include version): Debian9
My hosting provider, if applicable, is:
I can login to a root shell on my machine (yes or no, or I don't know): yes
I'm using a control panel to manage my site (no, or provide the name and version of the control panel): no
The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot): certboot 0.28.0
@JuergenAuer, I have the same error, my be I rephrase may probleme. I have a domain name: appli.setex.ovh that I redirect to the public IP of my router/firewall, and I then NAT my public IP to the server that hosts my site (this server is on my DMZ). I tried Let's encrypt and Certbot but I have the same problem. Maybe the problem has something to do with NAT? I don't know.
Is your DNS having the correct IP?
If I do dig +short appli.setex.ovh
I got: 41.188.49.23
What IP the following command gives if you execute it on your server: curl 'http://ifconfig.me'
Are the two IP addresses the same?
Ah, I have a little bit idea, but I want to confirm if the IP address of the Let'sEncrypt server is 172.65.32.248? I think it's indeed a firewall problem on the NAT.