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XCCDF
Guide to the Secure Configuration of Ubuntu 18.04
Introduction
General Principles
Run Different Network Services on Separate Systems
Run Different Network Services on Separate Systems
An XCCDF Group - A logical subset of the XCCDF Benchmark
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Run Different Network Services on Separate Systems
Whenever possible, a server should be dedicated to serving exactly one network service. This limits the number of other services that can be compromised in the event that an attacker is able to successfully exploit a software flaw in one network service.