On Sun, 8 Mar 2026, Andy Smith wrote: > On Sun, Mar 08, 2026 at 03:55:32PM +0100, Roger Price wrote: > > I would like to use 1.1.1.1 as my DNS server so I defined file > > /etc/NetworkManager/conf.d/DNS.conf > > https://wiki.archlinux.org/title/NetworkManager#Custom_DNS_servers
Thanks for the URL. Clause 4.7.3.1 Unmanaged /etc/resolv.conf looks like what I need. I defined file /etc/NetworkManager/conf.d/DNS.conf as : # Prevent NetworkManager from changing /etc/resolv.conf [main] dns=none I defined /etc/resolv.conf as # Use Cloudfare DNS instead of ISP's DNS nameserver 1.1.1.1 nameserver 1.0.0.1 nameserver 2606:4700:4700::1111 nameserver 2606:4700:4700::1001 I restarted NetworkManager and command NetworkManager --print-script now reports [main] dns=none The file /etc/resolv.conf has not been modified. This is a complete solution to my problem. :-) I read the Debian Wiki. Essentially, this says "use nm-connection-editor". The disadvantages of nm-connection-editor are : 1. Every connection profile in /etc/NetworkManager/system-connections/ has to be treated seperately. There is no global solution. 2. The technique covers IPv4 only, not IPv6. So I will stick with the ArchLinux clause 4.7.3.1 Unmanaged /etc/resolv.conf solution. Thanks to everyone who responded. Roger
