dnsmasq, network manager *still* not able to relay DNS queries or respond to DNS requests after VPN connection failure / die off

[Thomas Ward]

This remains an issue. Supposedly fixed, it's still an issue in 16.04.

When an OpenVPN connection enables, or dies off, dnsmasq ceases to respond. The upstream DNS servers set are two bind9 instances that both reply to direct queries, so the core issue is that `dnsmasq` is broken.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: dnsmasq-base 2.75-1ubuntu0.16.04.2
ProcVersionSignature: Ubuntu 4.4.0-72.93-generic 4.4.49
Uname: Linux 4.4.0-72-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Apr 12 15:58:28 2017
InstallationDate: Installed on 2016-12-20 (112 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
SourcePackage: dnsmasq
UpgradeStatus: No upgrade log present (probably fresh install)

[Nish Aravamudan (nacc)]

Thank you very much for filing this bug report. It seems like it is a real issue and I will place it on the Server Team's backlog for now.

[Mathieu Trudel-Lapierre (cyphermox)]

This bug is essentially about the same "VPN fails to DNS" issue as bug 1688018; marking as a duplicate, since the other bug report as more information about the issue.