Pretty simple, I installed OMV 6.0.12-1 in a VM today. Don't want or need IPv6 on any of them right now, so it's pretty standard practice to disable IPv6 in grub (/etc/default/grub and add 'ipv6.disable=1' to the linux default line). But on reboot I noticed a console message about something failing to start.
Turns out it's the webserver. Can't get to the web admin interface when IPv6 is disabled. I re-enabled, rebooted and it was fine. Disabled, rebooted and couldn't access it. I would like to be able to disable IPv6 and still use the system.
This was in syslog, not sure if it's an important part.
Feb 13 15:30:11 nas monit[434]: 'nas' Monit 5.27.2 started
Feb 13 15:30:11 nas monit[434]: 'nginx' process is not running
Feb 13 15:30:11 nas monit[434]: 'nginx' trying to restart
Feb 13 15:30:11 nas monit[434]: 'nginx' start: '/bin/systemctl start nginx'
Feb 13 15:30:11 nas systemd[1]: Starting A high performance web server and a reverse proxy server...
Feb 13 15:30:11 nas nginx[733]: nginx: [emerg] socket() [::]:80 failed (97: Address family not supported by protocol
)
Feb 13 15:30:11 nas nginx[733]: nginx: configuration file /etc/nginx/nginx.conf test failed
Feb 13 15:30:11 nas systemd[1]: nginx.service: Control process exited, code=exited, status=1/FAILURE
Feb 13 15:30:11 nas systemd[1]: nginx.service: Failed with result 'exit-code'.
Feb 13 15:30:11 nas systemd[1]: Failed to start A high performance web server and a reverse proxy server.