How To Secure A Linux Server Logo

How To Secure A Linux Server

1
Free
2
19,494
19 Oct 2024
10 September 2025
Visit Website

An evolving how-to guide for securing a Linux server that, hopefully, also teaches you a little about security and why it matters. Table of Contents: - Introduction - Guide Objective - Why Secure Your Server - Why Yet Another Guide - Other Guides - To Do / To Add - Guide Overview - About This Guide - My Use-Case - Editing Configuration Files - For The Lazy - Contributing - Before You Start - Identify Your Principles - Picking A Linux Distribution - Installing Linux Pre/Post Installation Requirements - Other Important Notes - Using Ansible Playbooks to secure your Linux Server - The SSH Server - Important Note Before You Make SSH Changes - SSH Public/Private Keys - Create SSH Group For AllowGroups - Secure /etc/ssh/sshd_config - Remove Short Diffie-Hellman Keys - 2FA/MFA for SSH - The Basics - Limit Who Can Use sudo - Limit Who Can Use su - Run applications in a sandbox with FireJail - NTP Client - Securing /proc - Force Accounts To Use Secure Passwords - Automatic Security Updates and Alerts - More Secure Random Entropy Pool (WIP) - Add Panic/Secondary/Fake password Login Security System - The Network Firewall With UFW (Uncomplicated Firewall) - iptables - Intrusion Detection And Prevention with PSAD - Application Intrusion Detection

FEATURES

SIMILAR TOOLS

Comprehensive security training platform for web developers, offering hands-on experience with real, vulnerable applications and concrete advice for securing code.

A comprehensive reference guide covering Nessus vulnerability scanner configuration, management, API usage, and best practices.

A practical guide to developing a comprehensive security monitoring and incident response strategy, covering incident response fundamentals, threat analysis, and data analysis.

A condensed field guide for cyber security incident responders, covering incident response processes, attacker tactics, and practical techniques for handling incidents.

A practical guide to enhancing digital investigations with cutting-edge memory forensics techniques, covering fundamental concepts, tools, and techniques for memory forensics.

A comprehensive SQL injection cheat sheet covering various database management systems and techniques.

Comprehensive endpoint protection platform providing unified visibility and security for cloud workloads, endpoints, and containers.

A comprehensive guide to network security monitoring, teaching readers how to detect and respond to intrusions using open source software and vendor-neutral tools.

Cybrary is an online learning platform that provides accessible and affordable training in cybersecurity skills.

PINNED

RoboShadow Logo

A cybersecurity platform that offers vulnerability scanning, Windows Defender and 3rd party AV management, and MFA compliance reporting, among other features.

Vulnerability Management
Proton Pass Logo

Proton Pass is a cross-platform password manager that provides encrypted storage, password generation, and security monitoring features with integrated 2FA and dark web monitoring capabilities.

Data Protection
NordVPN Logo

NordVPN is a commercial VPN service that encrypts internet connections and hides IP addresses through a global network of servers, featuring integrated threat protection and multi-device support.

Network Security
Mandos Logo

Fractional CISO service that helps B2B companies implement security leadership to win enterprise deals, achieve compliance, and develop strategic security programs.

Consulting
CybersecTools logoCybersecTools

Explore the largest curated directory of cybersecurity tools and resources to enhance your security practices. Find the right solution for your domain.

Operated by:

Mandos Cyber • KVK: 97994448

Netherlands • contact@mandos.io

VAT: NL005301434B12

Copyright © 2025 - All rights reserved