I don't know whether it is significant but I notice in syslog that for the second connection to the vpn I see the additional line
systemd-resolved[1001]: Using degraded feature set (UDP+EDNS0+DO) for DNS server 127.0.1.1. and I notice that a similar message is present in the log in comment #1 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1644098 Title: Network Manager + OpenVPN does not respond to DNS server change on second connection attempt Status in dnsmasq: New Status in network-manager package in Ubuntu: Confirmed Bug description: Scenario: Discovered on Kubuntu 16.10, upgraded from a fresh install of 16.04. While I only have the one computer to test with, the 16.10 is definitely relevant (I did not have this problem on 16.04) but I can't tell if the upgrade is part of it, (the upgrade may or may not be relevant). Have "full time" wired or wireless connection (does not matter which used) Part time OpenVPN connection set up via NetworkManager. Steps to reproduce 1. Fresh boot 2. ping a device on the VPN network (eg amachine.remotelan ) Result: "ping: amachine.remotelan: Name or service not known" 3. Connect to the VPN service via Network Manager. 4. ping amachine.remotelan - result: PING amachine.remotelan (192.168.68.44) 56(84) bytes of data. 64 bytes from amachine.remotelan (192.168.68.44): icmp_seq=1 ttl=127 time=7.75 ms 5. Disconnect from the VPN service again. ping result again "ping: amachine.remotelan: Name or service not known" 6. Reconnect to the VPN again, and ping again Observed: "ping: amachine.remotelan: Name or service not known" However "ping 192.168.68.44" responds successfully as expected Expected: PING ... 192.168.... 64 bytes from .. etc to the ping by name --------------- Further info I'm going to add in a subsequent comment. (just annotating syslog right now!) To manage notifications about this bug go to: https://bugs.launchpad.net/dnsmasq/+bug/1644098/+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
