How to fix DNS PROBE FINISHED NXDOMAIN issues?

Due to internet filtering options that may be setup on your home router, you may receive the error DNS_PROBE_FINISHED_NXDOMAIN when trying to authenticate with Moodle or SSO. We have provided a workaround below, but the best option is to adjust your internet filter so it is functioning properly.

Please note: Some anti-virus or anti-malware applications may prevent this change.

Macintosh

  1. Open Terminal on the macintosh.
  2. Type the following command exactly as it appears with spaces included and press enter: sudo nano /etc/hosts
  3. If prompted, enter your computer login password and press enter. For those using Gustavus-owned machines, this should be their email password. Note-the password will not appear on the screen as you are typing.
  4. This command will open a text editor. Use the arrow keys to move down to the first available blank line that you can write in. In this line you will add the IP address and host names for Moodle and SSO. Write them exactly as they appear here:
    1. 138.236.127.133 moodle.gac.edu
    2. 138.236.127.126 sso.gac.edu
  5. Press the Control key and the O key together to save your work
  6. Press the Control key and the x key together to exit
DNSerrormac2.png

Windows

  1. Enter Notepad in the start menu.
  2. Right click on Notepad and select Run as administrator.
  3. Open the file C:\Windows\System32\Drivers\etc\hosts
  4. Edit the file to look like the following
  5. File->Save
Hostsfile.PNG
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