New gTLDs are not supported for hostname
I have purchased a new gTLD, .online, and I gladly used it as a hostname for my virtual server with ISPConfig:
# hostname -f
test.online
I am installing ISPConfig using a script, and it ends with an error:
[INFO] Starting perfect server setup for Debian GNU/Linux 11 (bullseye)
[INFO] Checking hostname.
[ERROR] The host name test.online of your server is no fully qualified domain name (xyz.domain.com). Please check it is correctly set. (/lib/os/class.ISPConfigDebianOS.inc.php:1289)
[ERROR] Exception occurred: ISPConfigOSException -> Host name is no FQDN. (/ispconfig.ai.php:15)
Edited by asdfg x64