I also have been experiencing this. Connecting to WiFi network that uses any captive portal fails.
I dual boot with Windows, and everything is fine in Windows. System: Ubuntu 17.10 (Clean install) Behavior: After authenticating with the portal and connecting I cannot resolve DNS. My work around (after a lot of digging) was to edit "/etc/resolv.conf" And add "nameserver 8.8.8.8" (Google Public DNS) So my nameserver looked liked: nameserver 127.0.0.53 nameserver 8.8.8.8 I had to do this after every reboot obviously. Also very peculiar: I have been using this work-around every day since installing 17.10 one week ago. However, I connected to a regular home WiFi network (non-captive portal) fine last night. Then after returning to my work captive-portal WiFi network its now connecting and resolving DNS successfully. Without having to update my /etc/resolv.cong. I don't understand why... Wanted to mention while searching forums and bug reports I came across many reported bugs that are likely duplicates of this issue. Where users are reporting spotty or intermittent WiFi issues etc. Many think its kernel and driver issues, while this isn't the case. -- 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/1727237 Title: systemd-resolved is not finding a domain Status in systemd package in Ubuntu: Triaged Status in systemd source package in Xenial: Triaged Status in systemd source package in Zesty: Won't Fix Status in systemd source package in Artful: Triaged Status in systemd source package in Bionic: Triaged Bug description: I have an odd network situation that I have so far managed to narrow down to the inability to resolve a domain via systemd-resolved which is resolvable with nslookup. If I use nslookup against the two nameservers on this network I get answers for the domain, but ping says it is unable to resolve the same domain (as do browsers and crucially the captive portal mechanism). Here are details: NSLOOKUP: ~$ nslookup securelogin.arubanetworks.com 208.67.220.220 Server: 208.67.220.220 Address: 208.67.220.220#53 Non-authoritative answer: Name: securelogin.arubanetworks.com Address: 172.22.240.242 ~$ nslookup securelogin.arubanetworks.com 208.67.222.222 Server: 208.67.222.222 Address: 208.67.222.222#53 Non-authoritative answer: Name: securelogin.arubanetworks.com Address: 172.22.240.242 PING: ~$ ping securelogin.arubanetworks.com ping: securelogin.arubanetworks.com: Name or service not known mark@mark-X1Y2:~$ DIG: ~$ dig @208.67.222.222 securelogin.arubanetworks.com ; <<>> DiG 9.10.3-P4-Ubuntu <<>> @208.67.222.222 securelogin.arubanetworks.com ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 9416 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;securelogin.arubanetworks.com. IN A ;; AUTHORITY SECTION: arubanetworks.com. 1991 IN SOA dns5.arubanetworks.com. hostmaster.arubanetworks.com. 1323935888 3600 200 1209600 86400 ;; Query time: 34 msec ;; SERVER: 208.67.222.222#53(208.67.222.222) ;; WHEN: Wed Oct 25 10:31:10 CEST 2017 ;; MSG SIZE rcvd: 144 MORE DIG: ~$ dig securelogin.arubanetworks.com ; <<>> DiG 9.10.3-P4-Ubuntu <<>> securelogin.arubanetworks.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 3924 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 65494 ;; QUESTION SECTION: ;securelogin.arubanetworks.com. IN A ;; Query time: 0 msec ;; SERVER: 127.0.0.53#53(127.0.0.53) ;; WHEN: Wed Oct 25 10:34:01 CEST 2017 ;; MSG SIZE rcvd: 58 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1727237/+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
