I'm having troubles verifying 2 websites with letsencrypt. Running on latest ISPConfig on latest Ubuntu 17.04 DNS records are alright, i'm not sure where it goes wrong. Maybe in updating vhost for the .acme challenge? Logfile is to long so its on ubuntu's pastebin: http://paste.ubuntu.com/25751344/ It does create the files Code: [email protected]:/var/log/letsencrypt# ls -ahlp /usr/local/ispconfig/interface/acme/.well-known/acme-challenge/ total 20K drwxr-xr-x 2 ispconfig ispconfig 4.0K Oct 16 09:16 ./ drwxr-xr-x 3 ispconfig ispconfig 4.0K Sep 17 21:08 ../ -rw-r--r-- 1 root root 87 Oct 16 09:16 8J-gtkBNl7Y8VuHcEBtlROezqpUV1k1QfJNCoF0SqOU -rwxr-xr-x 1 ispconfig ispconfig 45 Sep 27 08:58 empty.dir -rw-r--r-- 1 root root 87 Oct 16 09:16 gxjASg9ra47GZnHnuhVxJY3Odpm8GxXP-Zipyt1xo5E But somehow they cant be read? -edit- Solution: It seems that my IPv6 configuration wasnt in order. The configured IP addres in /etc/network wasnt the same that ISPConfig auto filled after installing. Changed the IP Address in ISPCOnfig to match the /128 i have in /etc/network. After this, i updated my DNS records (since i just clicked on the IPv6 address) and IPv6 on my websites and waited for DNS to catch up. Then i could issues new certs.