Recently after setting up a Site to Site VPN between two Unifi Dream Machine Pro’s, I noticed the remote site was not resolving the active directory domain, the computers could also no longer update group policies or connect to the server. Everything else was working correctly and It took a few moments to figure out the simple issue. It turned out to be the Content Filtering profile.

  1. On the remote Unifi Dream Machine, select your network.
  2. Under the “Content FIltering” make sure None is selected. This setting will overide your set DNS settings.