The National Security Agency is recommending that security teams use designated DNS resolvers to lockdown DNS over HTTPS (DoH), effectively preventing eavesdropping, manipulation and exfiltration of DNS traffic.
While using DoH with external resolvers (servers that receive DNS queries) can work for home or mobile users and networks that do not use DNS security controls, for enterprise networks, NSA guidance released Thursday recommends using only designated enterprise DNS resolvers to leverage enterprise security defenses, facilitate access to local network resources, and protect internal networks
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