The National Security Agency (NSA) of the USA has published some security configuration guides for various popular Operating Systems. Linux is covered by the Red Hat Enterprise Linux 5 security guide, but most of the included information can be easily translated to other Linux distributions. As it is clearly stated in the guide’s disclaimer, all the included information only constitutes “recommended security changes” and not changes that should be made to all OS setups. Anyhow, even from the quick look I had inside, I can say that this is professional work. This document is an excellent read regardless of the Linux distribution you use. Guides for other operating systems, such as Microsoft Windows, Apple MacOS X, Sun Solaris 8/9, exist as well. I learned about these guides while browsing the mailing list archives of the Fedora Documentation Project (FDP) some days ago, so all credit goes to the person who posted it there in the first place.
Security Guides for Operating Systems by the NSA by George Notaras is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
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