Public bug reported: I never experienced problems with corporate servers on 14.04 and 16.04, but with 18.04 I have to restart systemd-resolved a few times per day.
What I see: Internet addresses are resolved, but corporate ones aren't. What I do to fix: sudo service systemd-resolved restart. After that corporate servers are resolved. It looks like some issue with DNS cache. $ lsb_release -rd Description: Ubuntu 18.04.1 LTS Release: 18.04 $ apt-cache policy systemd systemd: Installed: 237-3ubuntu10.3 Candidate: 237-3ubuntu10.3 Version table: *** 237-3ubuntu10.3 500 500 http://ru.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages 100 /var/lib/dpkg/status 237-3ubuntu10 500 500 http://ru.archive.ubuntu.com/ubuntu bionic/main amd64 Packages ** Affects: systemd (Ubuntu) Importance: Undecided Status: New ** Package changed: plymouth (Ubuntu) => systemd (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1792118 Title: systemd-resolved periodically fails to resolve names from corporate network To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1792118/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs