Hi everyone, so I’m having this weird issue. No matter the DNS and IP settings I use in NetworkManager, it will always generate the same resolv.conf.
resolv.conf
# Generated by NetworkManager
nameserver ::1
IPv6 is disabled by the way.
is
/etc/resolv.confa symlink?I actually thought about that too, but it isn’t.
#: file /etc/resolv.conf /etc/resolv.conf: ASCII text
I’m not sure but this might have to do with systemd-resolved. You may want to disable it, that might fix your problem
Thought about that too, but I don’t have resolvd nor systemd-resolv or systemd-resolve active. Nor do I have avahi running. Interesting isn’t it?
Do you have any DNS server on port 53? If so, could you check which process or application it is?
Nope :( Neither dnsmasq nor bind are installed. Nothing on port 53 either.
This is it.
I just found this file, now sure if it’s related or not.
$: cat /run/NetworkManager/resolv.conf # Generated by NetworkManager nameserver ::1and
$: cat /run/NetworkManager/no-stub-resolv.conf # Generated by NetworkManager nameserver ::1Edit: those are generated from the
/etc/resolv.confNM generates.Your /etc/resolv.conf is generated by your NetworkManager, which you know. Seeing the settings of NM can be confusing, and I had to try to remind myself. You can manually set these in NM or as someone else stated, systemd-resolved might be doing this as well. If you’re changing this inside of NM and you’re still seeing that, then something is changing it, again systemd-resolved is the most likely culprit but there are other applications that do DNS caching such as unbound, dnsmasq, etc.
You can try seeing NM with the nmcli command such as the following:
$ nmcli connection show Wired\ connection\ 1
Note that “Wired\ connection\ 1” is the name of my connection, but yours might vary. If you hit TAB though a few times it should give you options.
You’d then look for an option like ipv6.dns and if it’s not set you’ll see “–”.
However that “nameserver ::1” is just indicating the ipv6 loopback so on an ipv6 address your NM is saying look for something listening locally.
If you don’t like looking at nmcli you could also check nm-connection-editor command:
$ nm-connection-editor
And that opens a GUI for editting connections.
There’s also nmtui for NM’s terminal user interface.
If you’re getting DHCP, it could also be the DHCP server that’s giving you this address. In a standard house you’ll not set a specific IP address, but your router will give you one, and normally your home computers will also use your router for DNS. So potentially your router is setting this, but that’d be a misconfigured router really, because your router shouldn’t be telling your computer to look at local loopback for DNS requests.
Hi there, so,
- all connections are configured with
ignorefor ipv6. - all connections had DNS set to “manual”/(ignore dhcp), and they are set to
208.67.222.222. systemd-resolvedis not installed in the system.
Thanks!
- all connections are configured with
Move to ---->
systemd-networkd😉 . Btw check your system isn’t also running somethingsystemd-resolvedthat you probably will want to disable as you are using NM.I don’t have
systemd-resolvedinstalled.[ 0 ] root@blaster:~#: apt remove --purge --auto-remove systemd-resolved Reading package lists... Building dependency tree... Reading state information... Package 'systemd-resolved' is not installed, so not removed 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. [ 0 ] root@blaster:~#: ps aux | grep systemd root 496 0.0 0.3 103956 56616 ? Ss 10:17 0:05 /lib/systemd/systemd-journald root 520 0.0 0.0 27656 7352 ? Ss 10:17 0:00 /lib/systemd/systemd-udevd systemd+ 807 0.0 0.0 90528 7188 ? Ssl 10:17 0:00 /lib/systemd/systemd-timesyncd message+ 813 0.0 0.0 11956 6724 ? Ss 10:17 0:05 /usr/bin/dbus-daemon --system --address=systemd: --nofork --nopidfile --systemd-activation --syslog-only root 835 0.0 0.0 50060 8000 ? Ss 10:17 0:00 /lib/systemd/systemd-logind reglnx 6027 0.0 0.0 19868 11644 ? Ss 10:19 0:01 /lib/systemd/systemd --user reglnx 6107 0.0 0.0 11148 6744 ? Ss 10:19 0:01 /usr/bin/dbus-daemon --session --address=systemd: --nofork --nopidfile --systemd-activation --syslog-only reglnx 6514 0.0 0.1 594632 17812 ? Ssl 10:19 0:00 /usr/libexec/gnome-session-binary --systemd-service --session=gnome root 639055 0.0 0.0 6332 2028 pts/1 S+ 14:19 0:00 grep --color=auto systemd [ 0 ] root@blaster:~#:
