Debian User Forums

Azhar wrote: 2025-01-19 10:03 I have a debian 12 system, in which i changed the resolv.conf to following

Code: Select all

#  Generated by NetworkManager
nameserver 185.228.168.9
nameserver 8.8.8.8
nameserver 9.9.9.9

but when i run the following command it shows me DNS set by my DSL router

Code: Select all

( nmcli dev list || nmcli dev show ) 2>/dev/null | grep DNS
IP4.DNS[1]:                             192.168.10.1
IP4.DNS[2]:                             192.168.25.1

My question is, are the two IP4 DNS shown, are used by my system or network. If it is of my system, then why isn't it using DNS set in resolv.conf?
Edit
I got the following command through forums, i am not sure how it works or what it show

Code: Select all

( nmcli dev list || nmcli dev show ) 2>/dev/null | grep DNS

#  Generated by NetworkManager

script log.txt
getent ahosts 
PAGER= nmcli device show
exit

• nmcli - command-line tool for controlling NetworkManager

[main]
dns=none

sudo systemctl restart NetworkManager

supersede domain-name-servers 9.9.9.9;

*If you want to override the DNS servers provided by DHCP entirely and force the system to use the ones you provide, use the supersede entry:
supersede domain-name-servers

sudo dhclient -r
sudo dhclient

Uptorn wrote: 2025-02-05 03:41 The question of what program controls resolv.conf is a fun (as in ripping your hair out) rabbit hole explore.

Uptorn wrote: 2025-02-05 03:41 [..] the most direct and DE-independent way to set one's preferred DNS resolvers is to do so through isc-dhcp-client while also making certain to disable competing programs that would otherwise attempt to overwrite resolv.conf (such as Network Manager, which you have installed).