I cannot reproduce this with the libnss-resolve in Ubuntu 17.04 or 17.10. The original problem was reported with systemd 231; 17.04 shipped with 232. It is possible that this has been fixed in systemd upstream (the linked upstream bug has been closed), or it's possible that the DNS configuration for www.fidelityrewards.com has changed. I'm closing this fix-released, but if you know of another DNS name that is still broken because of this, please reopen.
** Changed in: systemd (Ubuntu) Importance: Undecided => Low ** Changed in: systemd (Ubuntu) Status: New => Fix Released -- 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/1668296 Title: not failing back to IPv4 when AAAA returns SERVFAIL Status in systemd: New Status in systemd package in Ubuntu: Fix Released Bug description: A reocrd exists, AAAA returns SERVFAIL, in this case resolution fails instead of falling back to IPv4 A record $ host www.fidelityrewards.com www.fidelityrewards.com has address 170.135.184.45 Host www.fidelityrewards.com not found: 2(SERVFAIL) $ wget www.fidelityrewards.com --2017-02-27 07:41:57-- http://www.fidelityrewards.com/ Resolving www.fidelityrewards.com (www.fidelityrewards.com)... failed: Name or service not known. wget: unable to resolve host address ‘www.fidelityrewards.com /etc/nsswitch.conf hosts: files myhostname mdns4_minimal [NOTFOUND=return] resolve [!UNAVAIL=return] dns wins libnss-resolve 231-9ubuntu3 To manage notifications about this bug go to: https://bugs.launchpad.net/systemd/+bug/1668296/+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