DNS Is Conduit Into Air-Gapped Networks, Say Researchers

Attackers Use DNS Tunneling as Command-and-Control Channel, Says Pentera
Assets kept behind air-gapped networks should be inaccessible, but researchers from Pentera describe how hackers use the DNS protocol as a command-and-control channel. To be truly safe, companies should isolate the DNS server used for air-gapped networks and filter traffic for anomalies.

air-gapped dns networks researchers