[Bug 1284607] Re: resolvconf ignores given dns-servers in /etc/network/interfaces

[Thomas Hood]

> Is dnsmasq getting its DNS server information from resolvconf,
> which in turn gets it from /etc/network/interfaces? Or, does
> dnsmasq take what it likes from /etc/network/interfaces directly,
> discarding the rest?


1. If you have only the dnsmasq-base and network-manager packages installed then a dnsmasq process is run as a slave of NetworkManager and gets its nameserver information exclusively from NetworkManager. This dnsmasq process provides name service exclusively at IP address 127.0.1.1.

2. If you have the "dnsmasq" package installed then a(nother) dnsmasq
process is run independently of NetworkManager. By default this
independent dnsmasq service is configured to obtain its nameserver
information exclusively from resolvconf which in turn gets nameserver
information from interface configuration processes including ifup, whose
configuration file is /etc/network/interfaces.

The fact that you have no /etc/dnsmasq.conf strongly suggests that you
do not have the "dnsmasq" package installed and so you fall into class
#1.

Dnsmasq itself never looks in /etc/network/interfaces.

To understand how resolvconf works, please consult
/usr/share/doc/resolvconf/README.gz .

To understand how Ubuntu uses NetworkManager, dnsmasq and resolvconf,
please consult https://www.stgraber.org/2012/02/24/dns-in-ubuntu-12-04/
.

** Changed in: dnsmasq (Ubuntu)
       Status: New => Invalid

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Title:
  resolvconf ignores given dns-servers in /etc/network/interfaces

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