Re: Populating IPv6 DNS addresses in resolv.conf

On 10/30/23 15:50, Timothy M Butterworth wrote:

On Mon, Oct 30, 2023 at 1:18 PM Pocket <pocket@columbus.rr.com> wrote:

On 10/30/23 09:04, Timothy M Butterworth wrote:

Hello All,

I have been following the recent emails regarding resolv.conf. I almost have my system running perfectly. The only thing I am missing is the population of IPv6 DNS addresses.

sudo less /etc/dhcp/dhclient.conf

supersede domain-name "home.arpa";
supersede dhcp6.domain-search "home.arpa";
supersede dhcp6.name-servers 2001:4860:4860::8888, 2001:4860:4860::8844;
supersede domain-name-servers 8.8.8.8, 8.8.4.4;

sudo less /etc/NetworkManager/NetworkManager.conf
[main]
plugins=ifupdown,keyfile

[ifupdown]
managed=false

[global-dns]
searches=home.arpa

sudo less /etc/NetworkManager/system-connections/Pixel5.nmconnection

[ipv4]
dns=8.8.4.4,8.8.8.8;
dns-search=home.arpa;
ignore-auto-dns=true #I tried with this on, commented out and set to false
may-fail=false
method=auto

[ipv6]
addr-gen-mode=stable-privacy
dns=2001:4860:4860::8888,2001:4860:4860::8844;
dns-search=home.arpa;
ignore-auto-dns=true #I tried with this on, commented out and set to false
may-fail=false
method=auto

sudo less /etc/resolv.conf

domain home.arpa
search home.arpa
nameserver 8.8.8.8
nameserver 8.8.4.4

For some reason I am not getting any IPv6 Name Servers populated.

Any thoughts are appreciated.

Tim

Why not use NetworkManagers internal DHCP client.

That is what I have done and then I don't need dhclient or dhcpcd.

I am not sure that you are really using dhclient as NetworkManager has not been set to use dhclient from the configuration that you have posted.

I know it is using dhclient because I typod the domain name supersede domain-name "home.apra"; and it populated .apra in resolv.conf.

What is the output from:

NetworkManager --print-config

Notice in the following dhcp=internal in my configuration

NetworkManager --print-config

sudo NetworkManager --print-config
# NetworkManager configuration: /etc/NetworkManager/NetworkManager.conf (lib: no-mac-addr-change.conf)

[main]
# rc-manager=
# auth-polkit=true
# dhcp=internal

^^^^^^^^^^^^^^^^^^

This states that you are running two DHCP clients as I suspected.

That is probably why you have the results you have.

This key sets up what DHCP client NetworkManager will use. Allowed values are dhclient, dhcpcd, and internal. The dhclient and dhcpcd options require the indicated clients to be installed. The internal option uses a built-in DHCP client which is not currently as featureful as the external clients.

If this key is missing, it defaults to internal. If the chosen plugin is not available, clients are looked for in this order: dhclient, dhcpcd, internal.

The commented entries are the defaults if not explicitly set

It's not easy to be me

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