[Bug 1766969] Re: DNS cannot be resolved in Hotel Hotspot

[Mark Schroeder]

I have the latest systemd recommended by #1727237, and this issue still
occurs at Starbucks as well.  The Starbucks WIFI defect is #1767900
which appears to be a duplicate of this one.

ii  systemd                                    237-3ubuntu10
amd64        system and service manager

I'm in a Starbucks now. #1727237 (the systemd above) does not fix my
issue.  aruba.odyssys.net is still not resolved using the stub-
resolv.conf file (linked from /etc/resolv.conf).

cd /etc
sudo /bin/rm resolv.conf
sudo /bin/ln -s ../run/systemd/resolve/resolv.conf resolv.conf

Using the original resolv.conf however, as per the changes above, does
work.  I did not make any changes to /etc/hosts.  The real resolv.conf
above contains the google nameservers and is sufficient to resolve
aruba.odyssys.net.

nameserver 8.8.8.8
nameserver 8.8.4.4
search home

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Title:
  DNS cannot be resolved in Hotel Hotspot

Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  I was asked to create a new bug for this in
  https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1727237 as it
  seems to be a different issue.

  I have installed the nightly image of Kubuntu Bionic from 25th of
  April.

  There systemd is in version 237-3ubuntu10.

  When connecting to the wifi hotspot in my hotel (Quality Hotel
  Augsburg) I cannot open the hotspot landing page that should give me
  access to the WIFI. With Windows and on an Iphone it's working.

  For the following distributions I can confirm it not working:
  Kubuntu 17.10
  Kubuntu 18.04 (nightly image 25th of April 2018)

  The logs were taken on 18.04.

  Workaround:
  sudo systemctl disable systemd-resolved.service
  sudo service systemd-resolved stop
  sudo rm /etc/resolv.conf
  sudo nano /etc/NetworkManager/NetworkManager.conf
    >> add "dns=default" under [main]
  sudo service network-manager restart

  Then I can connect to the WIFI and I see the login page in Firefox.

  To capture some data I did the following:
   - connect to Hotspot
   - enter golem.de

  Case 1: Fresh default Kubuntu install
  With a default Kubuntu install it does not work. I can connect to the WIFI and get IP and DNS from DHCP but I cannot resolve any hostname. When trying  to open the router ip directly in the browser it forwards to hotsplots.de which cannot be resolved.

  Case 2: With aforementioned Workaround
  I connect to the wifi, I open firefox and the login page shows up (if I havent been connected yet. In the capture I already was able to connect to the hotspot which allows immediately to connect to the webpage)

  PS: I'll be in this hotel till Friday 27th if more information are
  required.

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