Re: [PLUG] Controlling resolv.conf...

[Ben Koenig]

On 3/12/19 4:17 PM, wes wrote:
I recently struggled with this. It turns out, NetworkManager will only
modify /etc/resolv.conf if it is a symlink to /run/resolvconf/resolv.conf.
If it's a regular file, regardless of its permissions, NM will not touch it.

/etc/resolv.conf is not symlinked on every distro, and is not even 
unique to linux. It is not a symlink on my system, and is being 
overwritten by NetworkManager. Fun fact:  The decisions of Canonical are 
not canonical.


Other software probably still will, though, like dhclient.

Depends on how things are configured. /run/resolvconf/ is the state 
directory for resolvconf, and not tied specifically to NM.


As for the OP's question, there are a number of systems that handle 
configure DNS resolving, be it resolvconf, NetworkManager, WICD, or 
whatever that can do this. They are typically run on set schedules, such 
as at boot time (or when the user 'connects' to a network), and write to 
a file, such as /etc/resolv.conf.

Which network "service" are you using? I don't know what debian defaults 
do, but I would guess that it is NetworkManager. It usually is these 
days, but there are others.


I used to set my IP address in /etc/rc.d/rc.inet1.conf and then save my 
DNS servers in /etc/resolv.conf. Nothing would overwrite my changes, but 
that was before wifi and the millennial obsession with reinventing the 
init wheel.

-wes

On Tue, Mar 12, 2019 at 4:11 PM Ben Koenig <techkoe...@gmail.com> wrote:

Are you using NetworkManager?

Last I checked NetworkManager will overwrite customizations to
/etc/resolv.conf.
One of my systems currently has the line:

# Generated by NetworkManager

at the top, so I add all my stuff through the designated utility.
Networkmanager should be the same everywhere, but I'm not on debian
so.... things might be different.

On Mon, Mar 11, 2019 at 1:42 PM <mich...@robinson-west.com> wrote:
I have Spectrum cable where the ethernet connection to the modem
receives a dynamic ip address from Spectrum along with wrong name servers.
This is correct for resolv.conf:
search roch.robinson-west.com
nameserver 127.0.0.1

resolv.conf get's overwritten though by the modem...

I'm on a Debian Linux system. I need to ignore the nameserver settings
from Spectrum and the Spectrum search line.
Something called resolvconf will allow me to do this???

Another thing I'm wondering about is what the proper firewall settings
are to allow clients on my RFC 1918 network to use
the proxy on my server. I'm also wondering about the legality of sslbump
and what people who have deployed this can tell
me about enabling https support in squid?

Theoretically, I could have a list of https sites that are allowed and
disallow all others and not have a legal problem. With google pushing web
sites
to go https, it's not just banks and credit unions using it anymore.
Even google search is https. Uge! This is a nightmare for anyone who wants
their
Internet connection content filtered. Content filtering by it's very
nature requires a man in the middle. The https protocol is supposed to
guarantee
that there isn't a man in the middle. Some countries evidently will
prosecute you if you filter https connections. If I'm a business owner or a
home owner
running a network at home, what am I supposed to do?
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