Unable to resolve any website / No Internet

If an endpoint that uses a a Control D resolver is unable to access any website, there are a few things you can do to troubleshoot this.

There are several reasons why this issue can occur, and it all depends on how you configured Control D, and on what type of physical device.

Deleted Active Device


Most Common

If you delete an actively used Device / Endpoint from the web panel, while the associated DNS resolver is actively used on the physical device, you will lose all Internet, as the warning screen suggests when you delete the device. If our website (controld.com) loads, but nothing else does, then this is definitely the problem.

To fix the issue, simply remove the Control D DNS resolver from the device. This depends on how you installed it.

  • If you used the ctrld DNS daemon - run ctrld uninstall command or simply restart the machine
  • If you used the GUI app - open the app again, and click the Restore button

DNS Hijacking

Some ISPs and corporate or school networks hijack Legacy DNS and redirect it to their own resolvers. If the client happens to be on such a network AND uses Legacy DNS, there is nothing you can do about this except switch to a Secure DNS protocol like DNS-over-HTTPS or DNS-over-TLS.

Routing Issues

If you're using Secure DNS protocols, there should be very few reasons for it not working, except for routing issues. Try pinging dns.controld.com and see if you get a response, if you do not, that suggests the IP is not routable from your network. This should be rare, but if it occurs, send us a traceroute.