Public bug reported: This issue happens in Ubuntu 16.04 LTS as well.
When I connect via tun to an OpenVPN server, my DNS lookups do not succeed even though the OpenVPN service is started correctly and does provide the correct information. If I force NetworkManager to load its configuration via "killall -HUP NetworkManager" then it works. $ host git.my.domain.com Host git.my.domain.com not found: 5(REFUSED) $ sudo killall -HUP NetworkManager $ host git git.my.domain.com has address 192.168.1.7 Looking around I see that this appears to be an instance of this bug, in dnsmasq: https://bugzilla.redhat.com/show_bug.cgi?id=1367772 There are TWO patches (already applied to the dnsmasq source and queued for the next release, which is not out yet) needed to fix this problem, both mentioned in the above bug: http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commitdiff;h=2675f2061525bc954be14988d64384b74aa7bf8b http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commitdiff;h=16800ea072dd0cdf14d951c4bb8d2808b3dfe53d ProblemType: Bug DistroRelease: Ubuntu 16.10 Package: dnsmasq-base 2.76-4 ProcVersionSignature: Ubuntu 4.8.0-41.44-generic 4.8.17 Uname: Linux 4.8.0-41-generic x86_64 ApportVersion: 2.20.3-0ubuntu8.2 Architecture: amd64 CurrentDesktop: GNOME Date: Mon Mar 27 16:00:03 2017 InstallationDate: Installed on 2014-04-28 (1064 days ago) InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2) SourcePackage: dnsmasq UpgradeStatus: Upgraded to yakkety on 2017-03-25 (1 days ago) ** Affects: dnsmasq (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug yakkety -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to dnsmasq in Ubuntu. https://bugs.launchpad.net/bugs/1676597 Title: dnsmasq doesn't manage destruction/recreation of tun interface Status in dnsmasq package in Ubuntu: New Bug description: This issue happens in Ubuntu 16.04 LTS as well. When I connect via tun to an OpenVPN server, my DNS lookups do not succeed even though the OpenVPN service is started correctly and does provide the correct information. If I force NetworkManager to load its configuration via "killall -HUP NetworkManager" then it works. $ host git.my.domain.com Host git.my.domain.com not found: 5(REFUSED) $ sudo killall -HUP NetworkManager $ host git git.my.domain.com has address 192.168.1.7 Looking around I see that this appears to be an instance of this bug, in dnsmasq: https://bugzilla.redhat.com/show_bug.cgi?id=1367772 There are TWO patches (already applied to the dnsmasq source and queued for the next release, which is not out yet) needed to fix this problem, both mentioned in the above bug: http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commitdiff;h=2675f2061525bc954be14988d64384b74aa7bf8b http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commitdiff;h=16800ea072dd0cdf14d951c4bb8d2808b3dfe53d ProblemType: Bug DistroRelease: Ubuntu 16.10 Package: dnsmasq-base 2.76-4 ProcVersionSignature: Ubuntu 4.8.0-41.44-generic 4.8.17 Uname: Linux 4.8.0-41-generic x86_64 ApportVersion: 2.20.3-0ubuntu8.2 Architecture: amd64 CurrentDesktop: GNOME Date: Mon Mar 27 16:00:03 2017 InstallationDate: Installed on 2014-04-28 (1064 days ago) InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2) SourcePackage: dnsmasq UpgradeStatus: Upgraded to yakkety on 2017-03-25 (1 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/1676597/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
