[Bug 1766969] Re: DNS cannot be resolved in Public / Hotel / Starbucks WiFi Hotspot

[mike stewart]

This seems to affect many public Wifi Hotspots. A very common example is
the new setup by Starbucks/Google (usually seen as **Google Starbucks
Wifi**) in the US by (Tech behind it is https://globalreachtech.com/
with their http://odyssys.net/).

Under Ubuntu 16.04, Windows, Android, Mac OS, or iPhone, a WiFi guest
user can connect without problem.  However, since upgrading to Ubuntu
18.04, I've encountered this in at least three separate Starbucks stores
in Southern California.


## WORKAROUND ##

An easier workaround, with fewer system modifications than the original
bug report is to use `ip route` to determine the IP address of the host
router, then add the hostname with that adress to `/etc/hosts`


Step by step details can be found here: https://askubuntu.com/a/1027605/139249

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https://bugs.launchpad.net/bugs/1766969

Title:
  DNS cannot be resolved in Public / Hotel / Starbucks WiFi 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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