Network-manager configures non-working IPV6 DNS servers

English Network/Internet
1

I have a Geekom A8 MiniPC with the following Network hardware according to "inxi --network

Network:
Device-1: Realtek RTL8125 2.5GbE driver: r8169
Device-2: MEDIATEK MT7922 802.11ax PCI Express Wireless Network Adapter
driver: mt7921e
~
Basic network Configuration seems to work. ip addr shows

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host noprefixroute
valid_lft forever preferred_lft forever
2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br0 state UP group default qlen 1000
link/ether 38:f7:cd:c8:18:d4 brd ff:ff:ff:ff:ff:ff
altname enx38f7cdc818d4
3: wlp2s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 3a:bb:71:bd:32:49 brd ff:ff:ff:ff:ff:ff permaddr 1c:ce:51:8a:14:ea
altname wlx1cce518a14ea
4: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether f6:69:c0:13:71:c8 brd ff:ff:ff:ff:ff:ff
inet 192.168.178.67/24 brd 192.168.178.255 scope global dynamic noprefixroute br0
valid_lft 863038sec preferred_lft 863038sec
inet6 2a02:8071:71f0:1460:3e7:6aaa:6a00:20ab/64 scope global temporary dynamic
valid_lft 7066sec preferred_lft 3466sec
inet6 2a02:8071:71f0:1460:f469:c0ff:fe13:71c8/64 scope global dynamic mngtmpaddr noprefixroute
valid_lft 7066sec preferred_lft 3466sec
inet6 fe80::f469:c0ff:fe13:71c8/64 scope link noprefixroute
valid_lft forever preferred_lft forever

and I can ping i.e 8.8.8.8
But the DNS configuration seems to be broken dig opensuse.org shows:
;; communications error to ::1#53: connection refused
;; communications error to ::1#53: connection refused
;; communications error to ::1#53: connection refused
;; communications error to 127.0.0.1#53: connection refused

; <<>> DiG 9.20.9 <<>> opensuse.org
;; global options: +cmd
;; no servers could be reached
Any ideas how to fix that ?

And no Problem here with another tumbleweed installation:
Inxi
Network:
Device-1: Aquantia AQC113C NBase-T/IEEE 802.3an Ethernet [Marvell Scalable
mGig] driver: atlantic
Device-2: Realtek RTL8125 2.5GbE driver: r8169
Device-3: MEDIATEK MT7921K Wi-Fi 6E 80MHz driver: mt7921e
~
ip addr

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host noprefixroute
valid_lft forever preferred_lft forever
2: eno1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
link/ether c8:7f:54:cd:ca:ba brd ff:ff:ff:ff:ff:ff
altname enp104s0
altname enxc87f54cdcaba
3: enp5s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether d8:5e:d3:02:92:cd brd ff:ff:ff:ff:ff:ff
altname enxd85ed30292cd
inet 192.168.178.58/24 brd 192.168.178.255 scope global dynamic noprefixroute enp5s0
valid_lft 829595sec preferred_lft 829595sec
inet6 2a02:8071:71f0:1460:57cb:c37e:71e4:ee2f/64 scope global temporary dynamic
valid_lft 6777sec preferred_lft 3177sec
inet6 2a02:8071:71f0:1460:e75f:2cb:3989:35b3/64 scope global dynamic mngtmpaddr noprefixroute
valid_lft 6777sec preferred_lft 3177sec
inet6 fe80::b966:b97:357d:8935/64 scope link noprefixroute
valid_lft forever preferred_lft forever
4: wlp105s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 92:7e:1d:1a:65:d1 brd ff:ff:ff:ff:ff:ff permaddr c8:94:02:15:2c:f5
altname wlxc89402152cf5
5: vmnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 1000
link/ether 00:50:56:c0:00:01 brd ff:ff:ff:ff:ff:ff
altname enx005056c00001
inet 192.168.20.1/24 brd 192.168.20.255 scope global vmnet1
valid_lft forever preferred_lft forever
inet6 fe80::250:56ff:fec0:1/64 scope link proto kernel_ll
valid_lft forever preferred_lft forever
6: vmnet8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 1000
link/ether 00:50:56:c0:00:08 brd ff:ff:ff:ff:ff:ff
altname enx005056c00008
inet 172.16.233.1/24 brd 172.16.233.255 scope global vmnet8
valid_lft forever preferred_lft forever
inet6 fe80::250:56ff:fec0:8/64 scope link proto kernel_ll
valid_lft forever preferred_lft forever
and dig

; <<>> DiG 9.20.9 <<>> opensuse.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 27601
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;opensuse.org. IN A

;; ANSWER SECTION:
opensuse.org. 1884 IN A 195.135.223.50

;; Query time: 4 msec
;; SERVER: 192.168.178.1#53(192.168.178.1) (UDP)
;; WHEN: Mon Jun 09 19:00:30 CEST 2025
;; MSG SIZE rcvd: 57

2

Can you please post the output in preformatted text (</>). Makes it a lot less unreadable

3

Are you using DHCP or static IP?

4

using DHCP

5

Then it is the question to your DHCP server - it apparently does not return DNS servers. Show

ls -l /etc/resolv.conf
cat /etc/resolv.conf

Are you using wicked or NetworkManager?

6

I’am using NetworkManager ( and a ps aux shows that NetworkManager is running)
There is no /etc/resolv.conf on that system

7

Well, it again sounds like you DHCP server does not provide DNS servers.

If fixing DHCP server is not an option, you may consider adding DNS servers you want to your connection definition.

8

I made an error when looking for /etc/resolv.conf.
I used “less /etc/resolv.conf” which said “no such file or directory” because it was a link to non-existing /run/netconfig/resolv.conf.
However I found that there is /run/NetworkManager/resolv.conf, which contents looked reasonable. So I fixed that link and now name resolution seems to work again