[CentOS] From network-scripts to NetworkManager on a router : questions

Tue Feb 18 15:52:55 UTC 2020
Johnny Hughes <johnny at centos.org>

On 2/18/20 9:37 AM, Nicolas Kovacs wrote:
> Le 18/02/2020 à 12:28, Anand Buddhdev a écrit :
>> Neither. The DNS configuration should not normally be bound to a
>> specific interface, so don't configure it with any interface. If you do,
>> and that interface goes down, your DNS config also disappears.
> I would like to do that very much, only NetworkManager makes you jump
> through burning loops to do so.
> With network-scripts, it was just a matter of editing resolv.conf with
> nameserver and search domain directives.
> I can't do that anymore, because /etc/resolv.conf gets squashed by
> NetworkManager. If I don't fill in DNS information for the interfaces,
> then all I get is an empty "#Generated by NetworkManager" line.
> On the other hand, using nmtui, the only place where I can actually fill
> in DNS information is in the interface-specific dialogs.

Or use 'nmcli con mod <interface_name> ipv4.dns ""'

or edit:


> After googling around for this problem, it looks like I'm not the only
> one scratching my head.
> Any suggestions ?
> Niki

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