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##### :black_small_square: System hardening
+ :small_orange_diamond: CIS Benchmarks - are secure configuration settings for over 100 technologies, available as a free PDF download.
+ :small_orange_diamond: STIGs - are the configuration standards for DOD IA and IA-enabled devices/systems.
:small_orange_diamond: Security Harden CentOS 7 - this walks you through the steps required to security harden CentOS.
:small_orange_diamond: CentOS 7 Server Hardening Guide - great guide for hardening CentOS; familiar with OpenSCAP.