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I would like to apply server hardening policy[securing] on existing Ubuntu production servers. Will lead any issues after applying? What is the best practices to apply hardening on existing production environments.

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Best practices: Understand what the production servers do (deep internals), and consider whether or not your "hardening" will interfere with what they do.

"Harden" your test servers first.

A tool that I like is lynis from cisofy.com. It is free, and makes no changes, just points to vulnerabilities.

Realize that security/hardening is a process, not a paint. You cannot just spay it on once (and succeed).

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  • Thanks Waltinator for ur valuable information! Will look on it and will update feedback after tested... Aug 5, 2015 at 6:34

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