Output of systemd-resolve --status when the problem does not occur ** Attachment added: "sr-ok.txt" https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1716976/+attachment/4954625/+files/sr-ok.txt
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1716976 Title: DNS resolver silently switches to an unknown DNS server Status in systemd package in Ubuntu: New Bug description: In our network we have a DNS server that resolves some names to local addresses, while the same names are resolved to our public IP when public DNSs are used. For instance (using fictitious names and IPs), xyz.mydomain.com resolves to the public IP 65.254.242.180 when using an external DNS server, but resolves to 192.168.0.14 when using our internal DNS server (which all our computers are told to use via DHCP). This used to work fine until a somewhat recent update in Ubuntu 17.10. Now, xyz.domain.com almost always resolves to the public IP instead of the internal IP. Interestingly, restarting the systemd-resolved service fixes the problem for a while (from a few seconds to a few minutes). Right after restarting the service, the dig command reports the expected internal IP, but after a while it gets back to reporting the public IP. Forcing the dig command to query our DNS server instead of the local resolver returns the correct IP. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: systemd 234-2ubuntu9 ProcVersionSignature: Ubuntu 4.12.0-13.14-generic 4.12.10 Uname: Linux 4.12.0-13-generic x86_64 ApportVersion: 2.20.7-0ubuntu1 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Wed Sep 13 13:34:50 2017 InstallationDate: Installed on 2015-01-23 (963 days ago) InstallationMedia: Ubuntu-GNOME 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) MachineType: LENOVO 20266 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.12.0-13-generic.efi.signed root=UUID=eecad38d-4fff-462c-92bc-357fa12e5515 ro quiet splash vt.handoff=7 SourcePackage: systemd UpgradeStatus: Upgraded to artful on 2017-06-15 (90 days ago) dmi.bios.date: 03/30/2015 dmi.bios.vendor: LENOVO dmi.bios.version: 76CN43WW dmi.board.asset.tag: No Asset Tag dmi.board.name: Yoga2 dmi.board.vendor: LENOVO dmi.board.version: 31900058STD dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo Yoga 2 Pro dmi.modalias: dmi:bvnLENOVO:bvr76CN43WW:bd03/30/2015:svnLENOVO:pn20266:pvrLenovoYoga2Pro:rvnLENOVO:rnYoga2:rvr31900058STD:cvnLENOVO:ct10:cvrLenovoYoga2Pro: dmi.product.family: IDEAPAD dmi.product.name: 20266 dmi.product.version: Lenovo Yoga 2 Pro dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1716976/+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
