I was migrating my MiaB setup from one vServer to another and spent some hours to finde out the problem why the nsd4 process do not wanted to start. Every time I had the following error:
Public DNS (nsd4) is not running (port 53).
The problem was that I wanted to disable IPv6 (as it is not recommended for now, right?) and added some lines to the /etc/sysctl.conf file. With my first VPS it was not a problem: there I was able to disable IPv6 from the control panel.
Now I have 2 questions:
- Is it no problem that my VPS has an “unused” IPv6 because of security aspects or should I try to contact my hosting provider and ask to disable it?
- Why the disabling of IPv6 on Ubuntu did not work and “ruined” my whole MiaB setup?