I think there are actually two similar bugs here. The first I think is caused by [1], which I have confirmed is present in impish, but not focal or jammy. This can be demonstrated by the following:
$ resolvectl dns eth0 8.8.8.8 8.8.4.4 1.1.1.1 $ resolvectl dns eth0 Link 110 (eth0): 8.8.8.8 8.8.4.4 1.1.1.1 $ resolvectl dns eth0 "" # This SHOULD clear all DNS servers $ resolvectl dns eth0 Link 110 (eth0): 8.8.4.4 1.1.1.1 # Only 8.8.8.8 was removed. I think the second issue is caused by [2], which I have confirmed is present in impish and jammy, but not focal. This can be demonstrated by the following: $ resolvectl domain eth0 search1.internal search2.internal search3.internal $ resolvectl domain eth0 Link 2 (ens3): search1.internal search2.internal search3.internal $ resolvectl domain eth0 "" # This SHOULD clear all search domains $ resolvectl domain eth0 Link 2 (ens3): search2.internal search3.internal # Only search1.internal was removed [1] https://github.com/systemd/systemd/issues/19651 [2] https://github.com/systemd/systemd/issues/23027 ** Bug watch added: github.com/systemd/systemd/issues #19651 https://github.com/systemd/systemd/issues/19651 ** Bug watch added: github.com/systemd/systemd/issues #23027 https://github.com/systemd/systemd/issues/23027 ** Tags added: rls-ii-incoming rls-jj-incoming -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1975667 Title: systemd-resolved does not reset DNS server and search domain list properly after VPN disconnect To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1975667/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
