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awesome-security-hardening
A collection of awesome security hardening guides, best practices, tools and other resources. This is work in progress: please contribute by forking, editing and sending pull requests. You may also send suggestions on Twitter to @decalage2, or use https://www.decalage.info/contact
Table of Contents
- Security Hardening Guides and Best Practices
- Tools
- Books
Security Hardening Guides and Best Practices
Hardening Guide Collections
- CIS Benchmarks (registration required)
- ANSSI Best Practices
- NSA Security Configuration Guidance
- NSA Cybersecurity Resources for Cybersecurity Professionals and NSA Cybersecurity publications
- US DoD DISA Security Technical Implementation Guides (STIGs) and Security Requirements Guides (SRGs)
- OpenSCAP Security Policies
- Australian Cyber Security Center Publications
- FIRST Best Practice Guide Library (BPGL)
GNU/Linux
- ANSSI - Configuration recommendations of a GNU/Linux system
- nixCraft - 40 Linux Server Hardening Security Tips (2019 edition)
- nixCraft - Tips To Protect Linux Servers Physical Console Access
Red Hat Enterprise Linux - RHEL
- A Guide to Securing Red Hat Enterprise Linux 7
- DISA STIGs RHEL
- nixCraft - How to set up a firewall using FirewallD on RHEL 8
SUSE
- SUSE Linux Enterprise Server 12 SP4 Security Guide
- SUSE Linux Enterprise Server 12 Security and Hardening Guide
Ubuntu
Windows
- Microsoft - Windows security baselines
- Microsoft - Windows Server Security | Assurance
- Microsoft - Windows 10 Enterprise Security
- Awesome Windows Domain Hardening
- Microsoft - How to detect, enable and disable SMBv1, SMBv2, and SMBv3 in Windows and Windows Server
macOS
Network Devices
- NSA - Harden Network Devices - very short but good summary
Switches
Routers
Virtualization - VMware
Services
SSH
- NIST IR 7966 - Security of Interactive and Automated Access Management Using Secure Shell (SSH)
- ANSSI - (Open)SSH secure use recommendations
- Linux Audit - OpenSSH security and hardening
- Positron Security SSH Hardening Guides - focused on crypto algorithms
TLS/SSL
- NIST SP800-52 Rev 2 (2nd draft) - Guidelines for the Selection, Configuration, and Use of Transport Layer Security (TLS) Implementations - 2018, recommends TLS 1.3
- Netherlands NCSC - IT Security Guidelines for Transport Layer Security (TLS) - 2019
- ANSSI - Security Recommendations for TLS - 2017, does not cover TLS 1.3
- Qualys SSL Labs - SSL and TLS Deployment Best Practices - 2017, does not cover TLS 1.3
- RFC 7540 Appendix A TLS 1.2 Cipher Suite Black List
Web Servers
Apache HTTP Server
- Apache HTTP Server documentation - Security Tips
- GeekFlare - Apache Web Server Hardening and Security Guide
- Apache Config - Apache Security Hardening Guide
Apache Tomcat
- Apache Tomcat 9 Security Considerations / v8 / v7
- OWASP Securing tomcat
- How to get Tomcat 9 to work with authbind to bind to port 80
Eclipse Jetty
Microsoft IIS
Mail Servers
FTP Servers
Database Servers
LDAP
- OpenLDAP Security Considerations
- Best Practices in LDAP Security (2011)
- LDAP: Hardening Server Security (so administrators can sleep at night)
- LDAP Authentication Best Practices - retrieved from web.archive.org
- Hardening OpenLDAP on Linux with AppArmor and systemd - slides
- zytrax LDAP for Rocket Scientists - LDAP Security
- How To Encrypt OpenLDAP Connections Using STARTTLS
DNS
- NIST SP 800-81-2 - Secure Domain Name System (DNS) Deployment Guide (2013)
- CMU SEI - Six Best Practices for Securing a Robust Domain Name System (DNS) Infrastructure
- NSA BIND 9 DNS Security (2011)
NTP
- IETF - Network Time Protocol Best Current Practices draft-ietf-ntp-bcp (2019)
- CMU SEI - Best Practices for NTP Services
- Linux.com - Arrive On Time With NTP -- Part 2: Security Options
- Linux.com - Arrive On Time With NTP -- Part 3: Secure Setup
CUPS
Authentication - Passwords
Hardware - BIOS - UEFI
- NSA Info Sheet: UEFI Lockdown Quick Guidance (March 2018)
- NSA Tech Report: UEFI Defensive Practices Guidance (July 2017)
Cloud
Tools
Tools to check security hardening
GNU/Linux
- Lynis - script to check the configuration of Linux hosts
- OpenSCAP Base - oscap command line tool
- SCAP Workbench - GUI for oscap
- Tiger - The Unix security audit and intrusion detection tool (might be outdated)
Network Devices
- Nipper-ng - to check the configuration of network devices (does not seem to be updated)
TLS/SSL
Tools to apply security hardening
GNU/Linux
- Bastille Linux - outdated
Windows
- Hardentools - for Windows individual users (not corporate environments) at risk, who might want an extra level of security at the price of some usability.
- Windows 10 Hardening - A collective resource of settings modifications (mostly opt-outs) that attempt to make Windows 10 as private and as secure as possible.
- [HardeningAuditor] (https://github.com/cottinghamd/HardeningAuditor) - Scripts for comparing Microsoft Windows compliance with the ASD 1709 & Office 2016 Hardening Guides
- Windows 10 Initial Setup Script - PowerShell script for automation of routine tasks done after fresh installations of Windows 10 / Server 2016 / Server 2019