Public bug reported: Hi,
I think the name is self explanatory, let me paste some logs of what does my syslog look like at any given time: https://paste.ubuntu.com/25089356/ Jul 14 16:49:23 Tuxedo systemd-resolved[1120]: Using system hostname 'Tuxedo'. Jul 14 16:49:52 Tuxedo systemd-resolved[1120]: Switching to fallback DNS server 8.8.8.8. Jul 14 16:50:17 Tuxedo systemd-resolved[1120]: Switching to fallback DNS server 8.8.4.4. Jul 14 16:50:17 Tuxedo systemd-resolved[1120]: Switching to fallback DNS server 2001:4860:4860::8888. Jul 14 16:50:17 Tuxedo systemd-resolved[1120]: Switching to fallback DNS server 2001:4860:4860::8844. Jul 14 16:50:18 Tuxedo systemd-resolved[1120]: Switching to fallback DNS server 8.8.8.8. Jul 14 16:50:18 Tuxedo systemd-resolved[1120]: Switching to fallback DNS server 8.8.4.4. Jul 14 16:50:18 Tuxedo systemd-resolved[1120]: Using degraded feature set (UDP+EDNS0+DO) for DNS server 8.8.4.4. Jul 14 16:50:18 Tuxedo systemd-resolved[1120]: Switching to fallback DNS server 2001:4860:4860::8888. Jul 14 16:50:19 Tuxedo systemd-resolved[1120]: Switching to fallback DNS server 2001:4860:4860::8844. (...) Jul 14 16:50:43 Tuxedo systemd-resolved[1120]: Using degraded feature set (UDP+EDNS0+DO) for DNS server 78.46.223.24. Jul 14 16:50:43 Tuxedo systemd-resolved[1120]: Switching to DNS server 162.242.211.137 for interface tun0. Jul 14 16:50:44 Tuxedo systemd-resolved[1120]: Switching to DNS server 78.46.223.24 for interface tun0. Jul 14 16:50:45 Tuxedo systemd-resolved[1120]: Switching to DNS server 162.242.211.137 for interface tun0. Jul 14 16:50:48 Tuxedo systemd-resolved[1120]: Switching to DNS server 78.46.223.24 for interface tun0. Jul 14 16:50:48 Tuxedo systemd-resolved[1120]: Switching to DNS server 162.242.211.137 for interface tun0. Jul 14 16:50:49 Tuxedo systemd-resolved[1120]: Switching to DNS server 78.46.223.24 for interface tun0. Jul 14 16:50:50 Tuxedo systemd-resolved[1120]: Switching to DNS server 162.242.211.137 for interface tun0. Jul 14 16:50:50 Tuxedo systemd-resolved[1120]: Switching to DNS server 78.46.223.24 for interface tun0. This happens both over the VPN and without (only than without the VPN I don't get the log messages, just a huge packet loss): tux@Tuxedo:~$ ping google.es ^T192PING google.es (216.58.201.131) 56(84) bytes of data. 64 bytes from mad06s25-in-f3.1e100.net (216.58.201.131): icmp_seq=1 ttl=55 time=26.9 ms 64 bytes from mad06s25-in-f3.1e100.net (216.58.201.131): icmp_seq=5 ttl=55 time=19.5 ms 64 bytes from mad06s25-in-f3.1e100.net (216.58.201.131): icmp_seq=9 ttl=55 time=24.4 ms 64 bytes from mad06s25-in-f3.1e100.net (216.58.201.131): icmp_seq=10 ttl=55 time=22.3 ms 64 bytes from mad06s25-in-f3.1e100.net (216.58.201.131): icmp_seq=14 ttl=55 time=20.5 ms 64 bytes from mad06s25-in-f3.1e100.net (216.58.201.131): icmp_seq=20 ttl=55 time=20.7 ms 64 bytes from mad06s25-in-f3.1e100.net (216.58.201.131): icmp_seq=22 ttl=55 time=26.4 ms 64 bytes from mad06s25-in-f3.1e100.net (216.58.201.131): icmp_seq=24 ttl=55 time=29.2 ms 64 bytes from mad06s25-in-f3.1e100.net (216.58.201.131): icmp_seq=25 ttl=55 time=20.1 ms 64 bytes from mad06s25-in-f3.1e100.net (216.58.201.131): icmp_seq=26 ttl=55 time=22.7 ms 64 bytes from mad06s25-in-f3.1e100.net (216.58.201.131): icmp_seq=27 ttl=55 time=21.0 ms 64 bytes from mad06s25-in-f3.1e100.net (216.58.201.131): icmp_seq=28 ttl=55 time=30.4 ms 64 bytes from mad06s25-in-f3.1e100.net (216.58.201.131): icmp_seq=29 ttl=55 time=23.2 ms 64 bytes from mad06s25-in-f3.1e100.net (216.58.201.131): icmp_seq=30 ttl=55 time=29.1 ms 64 bytes from mad06s25-in-f3.1e100.net (216.58.201.131): icmp_seq=37 ttl=55 time=30.1 ms 64 bytes from mad06s25-in-f3.1e100.net (216.58.201.131): icmp_seq=40 ttl=55 time=24.8 ms 64 bytes from mad06s25-in-f3.1e100.net (216.58.201.131): icmp_seq=43 ttl=55 time=23.3 ms 64 bytes from mad06s25-in-f3.1e100.net (216.58.201.131): icmp_seq=45 ttl=55 time=22.9 ms 64 bytes from mad06s25-in-f3.1e100.net (216.58.201.131): icmp_seq=46 ttl=55 time=21.9 ms 64 bytes from mad06s25-in-f3.1e100.net (216.58.201.131): icmp_seq=53 ttl=55 time=23.7 ms 64 bytes from mad06s25-in-f3.1e100.net (216.58.201.131): icmp_seq=61 ttl=55 time=21.1 ms 64 bytes from mad06s25-in-f3.1e100.net (216.58.201.131): icmp_seq=62 ttl=55 time=19.3 ms ^C --- google.es ping statistics --- 62 packets transmitted, 22 received, 64% packet loss, time 61869ms rtt min/avg/max/mdev = 19.394/23.851/30.417/3.404 ms Let me know if I can provide any other details. ** Affects: systemd (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1704422 Title: systemd-resolved keeps swapping DNS servers and breaking name resolution To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1704422/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
