/tags/linux/Recent content in Linux on Linux SecurityHugoenThu, 23 Jan 2025 00:00:00 +0000/post/kali/Thu, 23 Jan 2025 00:00:00 +0000/post/kali/Kali Linux is a specialized Linux distribution designed for penetration testing, security research, computer forensics, and reverse engineering. Developed and maintained by Offensive Security, Kali Linux has become a go-to platform for ethical hackers and security professionals worldwide. It comes preloaded with a vast array of tools tailored to meet the diverse needs of the cybersecurity domain. Features and Highlights Kali Linux stands out from other distributions due to its unique features:/post/firewalls/Wed, 22 Jan 2025 00:00:00 +0000/post/firewalls/In the world of network security, firewalls play a critical role in protecting systems from unauthorized access and malicious traffic. They are a fundamental component of any secure network infrastructure. However, not all firewalls are created equal, and understanding the differences between application-level firewalls and IP-level firewalls is crucial for building an effective defense strategy. In this post, we’ll explore the key distinctions between these two types of firewalls, with a particular focus on the advantages of application-level firewalls./post/apparmor/Sat, 18 Jan 2025 00:00:00 +0000/post/apparmor/AppArmor (Application Armor) is a Linux Security Module (LSM) that provides a practical, easy-to-use Mandatory Access Control (MAC) framework for restricting the capabilities of applications. Unlike SELinux, which relies on complex policies, AppArmor simplifies security by using profile-based access control. Key Features Profile-Based Access Control: AppArmor restricts application behavior based on predefined profiles. Path-Based Security Policies: Unlike SELinux, which uses labels, AppArmor policies are based on file paths. Learning Mode: Allows administrators to create security profiles by observing application behavior./post/landlock/Tue, 14 Jan 2025 00:00:00 +0000/post/landlock/Landlock is a Linux Security Module (LSM) that provides a flexible, unprivileged sandboxing mechanism for applications. Unlike traditional LSMs such as SELinux and AppArmor, which enforce mandatory access control policies set by system administrators, Landlock allows applications to define their own security restrictions. This makes it a powerful tool for developers seeking to add additional security layers without requiring elevated privileges. Key Features Unprivileged Sandboxing: Landlock enables applications to apply security restrictions without requiring root access or administrative intervention./post/lsm/Sat, 04 Jan 2025 00:00:00 +0000/post/lsm/Linux Security Modules (LSM) Linux Security Modules (LSM) is a framework that allows different security models to be implemented as kernel modules. It provides the necessary hooks within the Linux kernel for implementing access control mechanisms beyond the traditional Unix permissions model. Several LSMs are available, each with different use cases and security policies. SELinux Security-Enhanced Linux (SELinux) is one of the most well-known Linux Security Modules. Developed by the NSA, SELinux enforces Mandatory Access Control (MAC) policies, restricting processes and users based on predefined security policies./post/honeypots/Fri, 23 Aug 2024 00:00:00 +0000/post/honeypots/Honeypots in Computer Security Honeypots are important tools in computer security that can help organizations detect and respond to attacks. A honeypot is a system or network that is designed to look like a real target, but is actually used to monitor and analyze attacks. Honeypots can be used to gain insight into attackers’ tactics, techniques, and procedures, and can help organizations improve their security posture. Detection of Attacks One of the key benefits of honeypots is that they allow organizations to detect attacks that might otherwise go unnoticed./post/podman-namespaces/Sun, 31 Mar 2024 00:00:00 +0000/post/podman-namespaces/Introduction Podman is an alternative to Docker, providing a similar interface. Podman allows users to create and manage containers on a Linux system. One of the challenges with containerization is the need to run containers as the root user, which can pose a security risk. One solution to this problem is to use user namespaces with Podman. In this article, we will explore what user namespaces are, how they can be used with Podman, and how to run a container as root inside the container while being non-root outside the container./post/containers-selinux/Fri, 31 Mar 2023 00:00:00 +0000/post/containers-selinux/Introduction Linux containers provide a lightweight and efficient way to run multiple isolated environments on a single host. While containers offer many benefits, such as improved resource utilization and faster application deployment, there are also security concerns that must be considered. One security implementation that can be used with containers is SELinux. In this article, we will explore some of the security features of SELinux and how they can be used to secure Linux containers./post/linux-security/Sat, 25 Mar 2023 00:00:00 +0000/post/linux-security/Introduction As a widely used operating system, Linux is often targeted by hackers and malicious actors. Therefore, it is crucial to harden Linux to make it more secure. Hardening Linux involves taking a series of measures to minimize vulnerabilities, prevent attacks, and mitigate the impact of successful attacks. By implementing these measures, Linux administrators can reduce the risk of data breaches, system disruptions, and other security incidents. Securing the Linux Kernel The Linux kernel is the core of the operating system, and securing it is essential for overall system security./post/seccomp/Sat, 25 Mar 2023 00:00:00 +0000/post/seccomp/Introduction: Understanding Seccomp Seccomp is a Linux kernel feature that enables administrators to restrict the actions that a process can perform, thus providing an additional layer of security. It stands for “secure computing mode” and was first introduced in the 2.6.12 kernel. Seccomp is a powerful tool for enhancing the security of a Linux system, as it helps to mitigate the risks of exploitation from untrusted code and malware. How Seccomp Works Seccomp works by limiting the system calls that a process can make./post/libvirt-selinux/Sat, 25 Mar 2023 00:00:00 +0000/post/libvirt-selinux/Introduction Libvirt is an open-source tool used for managing virtual machines on Linux systems. One of the challenges with virtualization is ensuring that the host system and virtual machines are secure. SELinux, or Security-Enhanced Linux, is a security module that can be used to add an additional layer of security to both the host system and virtual machines. In this article, we will explore how SELinux can be used to protect the host and virtual machines./post/rootkits-linux/Thu, 23 Mar 2023 00:00:00 +0000/post/rootkits-linux/Rootkits on Linux: A Threat to System Security A rootkit is a type of malicious software that allows an attacker to gain privileged access to a computer system. This access can be used to steal sensitive information, install additional malware, or carry out other malicious activities. Rootkits on Linux can be particularly dangerous, as they can go undetected for long periods of time and allow an attacker to gain complete control over the system./post/selinux/Thu, 23 Mar 2023 00:00:00 +0000/post/selinux/SELinux: Enhancing System Security SELinux stands for Security-Enhanced Linux, which is a security module implemented in the Linux kernel. It provides an additional layer of security by enforcing mandatory access control policies on top of the traditional discretionary access control mechanisms provided by the Linux kernel. SELinux was developed by the National Security Agency (NSA) and external contributors in collaboration with Red Hat and has been integrated into various Linux distributions, including Red Hat Enterprise Linux, Rocky Linux, AlmaLinux, and Fedora./post/kvm/Wed, 22 Mar 2023 00:00:00 +0000/post/kvm/Introduction The Linux Kernel Virtual Machine (KVM) is a hypervisor that allows multiple virtual machines to run on a single Linux host machine. KVM is an open-source technology that is integrated into the Linux kernel and supports various hardware platforms, including x86, ARM, and PowerPC. In this article, we will discuss the key features and benefits of KVM, how it works, and how to install and configure KVM on a Linux machine.