Re: DNS on minimal new installation
On Thu, Oct 24, 2024 at 20:16:30 +0100, Chris Green wrote:
> It works fine though. The /etc/resolv.conf is:-
>
> domain zbmc.eu
> search zbmc.eu
> nameserver 192.168.1.1
>
> which simply means all DNS gets passed to my LAN's DNS server. Is that
> what one gets on a minimal installation, no explicit DNS server or
> resolv management? I'm very happy with this, it's very simple and the
> backup system isn't going to make a lot of DNS queries such that it
> needs a DNS cache. Have I understood this OK?
In a typical installation, on a typical network, you will get your DNS
configuration via DHCP, from whatever is acting as your network's DHCP
server. In your case, I'm guessing it's a router.
Check the /etc/network/interfaces file and see if you have your interface
configured for dhcp. I'm guessing you do.
With DNS configuration being provided by DHCP, any changes you make to
the /etc/resolv.conf file will be overwritten every time the DHCP client
daemon renews its DHCP lease. This will usually happen once or twice
per day.
If you'd like to set up a local caching DNS nameserver, then you'll need
to work out a way to change your resolv.conf file without your changes
being overwritten. There are many different approaches to this.
See <https://wiki.debian.org/resolv.conf> to see some ways of doing it.
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