Hi, I just upgraded from Ubuntu 16.10 to 17.04 and observed the following systemd-resolve behaviour that might be related to this bug:
--> Any domain listed after the "search" keyword in /etc/resolv.conf stops being resolved by systemd-resolve. respectively --> Any domain listed as "DNS Domain:" when querying "systemd-resolve --status" stops being resolved by systemd-resolve I confirmed with tcpdump that systemd-resolve will not query my local or any dnsserver for any subdomains for any domain listed under the "search" keyword. Changing the domains after the search keyword in /erc/resolv.conf immediately changes which domains systemd-resolve will ignore and not resolve. The search domain is normally automatically set in response to receiving an "option domain-name" from the local dhcp server and normally used to translate requests for www to e.g. www.localdomain.at if localdomain.at was the domain-name sent by the DHCP server. -- 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/1624320 Title: systemd-resolved appends 127.0.0.53 to resolv.conf alongside existing entries Status in systemd package in Ubuntu: Confirmed Bug description: systemd-resolved, or more precisely the hook script /lib/systemd/system/systemd-resolved.service.d/resolvconf.conf, causes resolvconf to add 127.0.0.53 to the set of nameservers in /etc/resolv.conf alongside the other nameservers. That makes no sense because systemd-resolved sets up 127.0.0.53 as a proxy for those other nameservers. The effect is similar to bug 1624071 but for applications doing their own DNS lookups. It breaks any DNSSEC validation that systemd-resolved tries to do; applications will failover to the other nameservers, bypassing validation failures. And it makes failing queries take twice as long. /etc/resolv.conf should have only 127.0.0.53 when systemd-resolved is active. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1624320/+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
