I think configuring NetworkManager not to touch it is the right solution.
Unless there are cases where NetworkManager ignores its configuration
but I haven't seen those.
A fancier solution might be to have some kind of systemd script that
rewrites it if and only if the unbound daemon has successfully started
and I thought about looking in to doing that, but that means if the
unbound daemon for some reason doesn't start, it would be using the less
secure ISP provided DNS resolution and I'd rather have it fail so I know
there's a problem and can investigate.
On 04/12/2017 02:02 AM, Nux! wrote:
OR just make the file immutable if it's so critical to you.
--
Sent from the Delta quadrant using Borg technology!
Nux!
www.nux.ro
----- Original Message -----
From: "Jon LaBadie" <jcu@xxxxxxxxxx>
To: "CentOS mailing list" <centos@xxxxxxxxxx>
Sent: Wednesday, 12 April, 2017 07:16:22
Subject: Re: Network Manager / CentOS 7 / local unbound
On Tue, Apr 11, 2017 at 01:40:21AM -0700, Alice Wonder wrote:
Hello list -
http://unix.stackexchange.com/questions/90035/how-to-set-dns-resolver-in-fedora-using-network-manager
That says it works for CentOS 5 and I *suspect* the methods there (3 listed)
would work, but what is the best way with NetworkManager to set it up to use
the localhost for DNS ?
I'm paranoid about DNS spoofing and really prefer to have a local instance
of DNSSEC enforcing unbound running on my CentOS 7 virtual machines (e.g.
linode)
Currently I just use a cron job that runs once a minute to over-write was it
is /etc/resolv.conf so they don't use the DHCP assigned nameservers, but
that does leave a short window every time the network is restarted.
Besides the suggested configs, if still worried you could set up
an inotify watch on /etc/resolv.conf to let you know, or take
action, whenever it changes.
jon
--
Jon H. LaBadie jon@xxxxxxxxxx
11226 South Shore Rd. (703) 787-0688 (H)
Reston, VA 20190 (703) 935-6720 (C)
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