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XCCDF
Guide to the Secure Configuration of Alibaba Cloud Linux 3
Services
DNS Server
Isolate DNS from Other Services
Run DNS Software on Dedicated Servers
Run DNS Software on Dedicated Servers
An XCCDF Group - A logical subset of the XCCDF Benchmark
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Run DNS Software on Dedicated Servers
Since DNS is a high-risk service which must frequently be made available to the entire Internet, it is strongly recommended that no other services be offered by systems which act as organizational DNS servers.