I’ve seen seccomp, short for “secure computing,” become an essential tool in my Linux toolkit. It’s a Linux kernel feature that lets you filter system calls, effectively limiting what a process can do. This is especially useful when running containers - it helps prevent a compromised container from causing damage to the host system. In this article, I’ll explore how to use seccomp to lock down container privileges in Linux.
[Read More]I’ve been using AppArmor for years to add an extra layer of security to my Linux systems. It’s a Mandatory Access Control (MAC) system that lets you restrict what applications and services can do. By defining a set of rules, you can control file access, network connections, and system calls. This helps prevent malicious activities and gives you more peace of mind.
To get started with AppArmor, you’ll need to install the apparmor package. On Debian-based systems, I usually start with:
I’ve been using Linux for years, and one feature that’s really caught my attention is Kernel Lockdown Mode. This security feature restricts access to certain kernel features, making it more difficult for an attacker to escalate privileges or modify the kernel. It was introduced in Linux kernel 5.4, back in 2019, and has been improved in subsequent releases. As of 2026, Kernel Lockdown Mode is a mature feature that can be easily enabled on most Linux distributions.
[Read More]As a Senior Linux Security Architect, I have witnessed the evolution of Linux kernel vulnerabilities and exploitation techniques over the years. In 2025, we saw a significant increase in the number of reported vulnerabilities, with many of them being critical in nature. In this blog post, we will discuss the current trends in Linux kernel vulnerabilities and exploitation in 2026.
The Linux kernel is a complex and widely used operating system, which makes it a prime target for attackers. In 2025, we saw a number of high-profile vulnerabilities, including CVE-2022-32250, which allowed attackers to escalate privileges and gain control of the system. These types of vulnerabilities are a major concern for system administrators and security professionals.
[Read More]Security-Enhanced Linux (SELinux) is a security module integrated into the Linux kernel that provides a mechanism for enforcing mandatory access controls (MAC). Unlike traditional discretionary access controls (DAC), which rely on user permissions, SELinux applies security policies that define what actions processes and users can perform on a system. This results in a more robust security model, minimizing the risk of privilege escalation and unauthorized access.
SELinux enhances the security of Linux systems by enforcing strict access controls. It is particularly useful for environments where security is a priority, such as servers, enterprise systems, and containers. Key benefits include:
[Read More]Security is a crucial aspect of any Linux system. To maintain a secure environment, it’s important to monitor activities, track events, and log significant changes. The Linux Audit system provides a comprehensive framework for auditing and logging, enabling administrators to monitor user activity, detect security violations, and meet compliance requirements.
The Linux Audit system is a powerful tool that logs system events based on user-defined rules. It records detailed information about activities such as file access, configuration changes, and authentication attempts. The logs generated by the Audit system can help identify unusual behavior or unauthorized access, providing an essential layer of security.
[Read More]AIDE, or Advanced Intrusion Detection Environment, is an open-source intrusion detection tool designed to monitor file and directory integrity on Linux and Unix-based systems. By comparing the current state of the system against a predefined baseline, AIDE helps administrators detect unauthorized changes that might indicate a security breach or system compromise.
Highly configurable and lightweight, AIDE is a valuable component of any security-focused setup, offering a proactive approach to system monitoring.
[Read More]Metasploit is a comprehensive, open-source framework designed to facilitate penetration testing, security research, and vulnerability assessment. Initially created by H.D. Moore in 2003, Metasploit has since evolved into a robust platform maintained by Rapid7. It is a go-to tool for ethical hackers and security professionals, offering an extensive library of exploits, payloads, and auxiliary modules to simulate attacks and identify vulnerabilities in systems.
Metasploit includes thousands of exploits targeting various platforms, applications, and devices. These exploits allow security professionals to test how vulnerable systems respond to simulated attacks.
[Read More]In today’s digital world, maintaining robust security is more critical than ever. Cyberattacks are becoming increasingly sophisticated, and businesses of all sizes must constantly stay ahead of evolving threats. One way organizations can ensure a strong defense is by leveraging Security Information and Event Management (SIEM) solutions. These platforms help security teams detect, respond to, and manage security incidents in real time.
Among the various SIEM solutions available, Wazuh has emerged as one of the most powerful and flexible open-source tools for security monitoring and incident detection. Wazuh provides real-time log analysis, threat detection, and security monitoring that can help organizations safeguard their systems, comply with regulatory standards, and streamline their security operations.
[Read More]SSSD (System Security Services Daemon) is a powerful tool for managing authentication, identity, and access in Linux environments. It provides a unified interface for interacting with remote identity and authentication providers, simplifying system administration in enterprise environments. Whether you’re integrating Linux systems with Active Directory, LDAP directories, or other authentication backends, SSSD can streamline your configuration and improve system security.
This post dives into what SSSD is, how it works, its benefits, and how to set it up on a Linux system.
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