

Ubuntu wiki – Security Hardening Features.SUSE Linux Enterprise Server 12 Security and Hardening Guide.SUSE Linux Enterprise Server 12 SP4 Security Guide.HighOn.Coffee – Security Harden CentOS 7 (2015).Lisenet – CentOS 7 Server Hardening Guide (2017).nixCraft – How to set up a firewall using FirewallD on RHEL 8.DISA STIGs – Red Hat Enterprise Linux 7 (2019).Red Hat – A Guide to Securing Red Hat Enterprise Linux 7.Neo23x0/auditd – Best Practice Auditd Configuration.trimstray – Iptables Essentials: Common Firewall Rules and Commands.ERNW – IPv6 Hardening Guide for Linux Servers.TecMint – 4 Ways to Disable Root Account in Linux.nixCraft – Tips To Protect Linux Servers Physical Console Access.nixCraft – 40 Linux Server Hardening Security Tips (2019 edition).How To Secure A Linux Server – for a single Linux server at home.trimstray – Linux Hardening Checklist – most important hardening rules for GNU/Linux systems (summarized version of The Practical Linux Hardening Guide).

trimstray – The Practical Linux Hardening Guide – practical step-by-step instructions for building your own hardened systems and services.CIS Benchmark for Distribution Independent Linux.ANSSI – Configuration recommendations of a GNU/Linux system.Harden the World – a collection of hardening guidelines for devices, applications and OSs (mostly Apple for now).FIRST Best Practice Guide Library (BPGL).Australian Cyber Security Center Publications.US DoD DISA Security Technical Implementation Guides (STIGs) and Security Requirements Guides (SRGs).NSA Cybersecurity Resources for Cybersecurity Professionals and NSA Cybersecurity publications.Security Hardening Guides and Best Practices Hardening Guide Collections You may do this by creating issue tickets or forking, editing and sending pull requests. This is work in progress: please contribute by sending your suggestions. A collection of awesome security hardening guides, best practices, checklists, benchmarks, tools and other resources.
