Setting DNS settings to Default or Flushing DNS cache to fix Dragonfly3 Connectivity Issues

Instructions on Settings DNS default settings and flushing DNS cache to fix connectivity issues to Dragonfly3 on Mac & Windows

Updated October 9, 2026

Drexel DNS

144.118.27.33 and 144.118.27.50 are the DNS addresses for Drexel. But letting your computer automatically detect this is usually best for on-campus network resources.

Refer to the directions above to change the DNS on your MacOS or Windows machine.

Do this on machines that stay on Drexel campus only.

Resetting Network Settings to Default (Windows)

Open up Control Panel. The shortcut for this is Win + R, and typing "Control."

Select Network and Internet, then click on Network and Sharing Center.

Click on "Change adapter settings."

Right-click on the network adapter that is currently in use, and select Properties.

Select Internet Protocol Version 4 (TCP/IPv4), and select Properties

Confirm that the IP address configuration is set to be obtained automatically.

Click OK to save your changes.

Flushing DNS cache on Mac

In your Mac, open up the terminal.
Type in 'sudo dscacheutil -flushcache' and press enter
Then, type in the command 'sudo killall -HUP mDNSResponder' and press Enter
This should clear your DNS cache on Mac and it will allow you to use Drexel's DNS servers

Disabling DNS over HTTPS

If you keep having issues after you have ensured that you are on Drexel's DNS servers, you may need to disable secure DNS or DNS over HTTP (DOH) in your browser.

Firefox: First, open Settings. Then, select Privacy and Security, and scroll down to 'DNS over HTTPS'. Select the 'Off' option to disable DOH.