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.
