For example, we dive into Security-Enhanced Linux and see why it is important to use it with Apache and how it benefits us. SELinux represents mandatory access controls , allowing fine-grain access controls for resources such as files, devices, networks, and inter-process communication. In many cases, administrators disable SELinux because it causes complications with Apache, and there is not enough time to configure everything correctly in the system. At the machine level, drives can be encrypted and the BIOS can be secured. At a system level, login security can be considered and password policies can be enacted.

Have a solid understanding of core local system administration and networking concepts equivalent to that obtained from LFS301 Linux System Administration and LFS311 Linux Networking and Administration. This course outlines some additional resources that might be useful for your continued learning of Linux security.

Confidentiality — Sensitive information must be available only to a set of pre-defined individuals. Unauthorized transmission and usage of information should be restricted. For example, confidentiality of information ensures that a customer’s personal or financial information is not obtained by an unauthorized individual for malicious purposes such as identity theft or credit fraud. In addition to the end-of-lesson labs, this course provides you with quizzes to help you learn content and prepare for the LPI Exam 303 test. You will also find interactive CLI sim exercises and drag-and-drop content exercises to help you retain knowledge. These labs are provided as text as well as video solutions so you can work through them on your own and then compare your work to the author’s.

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This advanced Linux security course is for everyone involved with any security related tasks including implementation technicians, developers and managers will gain additional expertise from this course. Jason Cannon I help IT professionals level-up their careers by teaching them practical Linux skills. This course covers a range of points to consider when securing your Linux systems and the best strategies to take.

If you would like email support, use the command “yum install sendmail” for CentOS 7 or “apt-get install sendmail-bin sendmail” for Debian. From there, the command “rpm -ev ” can be used to remove installed packages. A wide variety of accessible options allow you to update Linux while using Ubuntu.

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However, since administrators often find themselves forced to use these services, careful configuration is critical. Security administrators are only as good as the tools they use and the knowledge they retain. Take any of the assessment tools currently available, run them against your system, and it is almost a guarantee that there are some false positives. Think of a vulnerability assessment as the first step to a penetration test. Whereas the assessment is undertaken to check for holes and potential vulnerabilities, the penetration testing actually attempts to exploit the findings.

Linux Hardening and Security Lessons

Even the most vigilant organization can fall victim to vulnerabilities if the network services they choose are inherently insecure. To aid in the selection of tools for a vulnerability assessment, it is helpful to establish a vulnerability assessment methodology. Unfortunately, there is no predefined or industry approved methodology at this time; however, common sense and best practices can act as a sufficient guide. The course examines common application security tools and techniques in a simple step-by-step recipe in order to build a hardened Linux server platform.

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By providing visibility both into attack vectors and possible security holes, this course provides you a complete guide on how to mitigate security risks in any Linux environment. The instructor provides thorough details of almost all security essentials for the Linux systems.

For example, you might do a search for “Udemy Linux Security and Hardening, The Practical Security Guide. Promo code” or “Linux Security and Hardening, The Practical Security Guide. To use this method, do a Google search for the LSAHTPSG training, but in your search query, be sure to add words like coupon code, promo code, deal, sale, discount, and Udemy. Yes, you will be able to interact with the students and the teacher, Jason Cannon, online, but it’s a different kind of experience than what you’d get if you were interacting with them in person.

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Unauthorized users should be restricted from the ability to modify or destroy sensitive information. Linux systems administrators and others responsible for deploying secure open systems. Why should you be interested in Linux Host Security, Linux is secure, isn’t it? Those of us who are a little more paranoid understand that “nothing is secure” and will benefit from understanding how to lock up your host more securely than the default.

A remote machine acts as a node on your local network, finds vulnerabilities with your servers, and installs a backdoor program or Trojan horse to gain control over your network resources. Leaving administrative passwords blank or using a default password set by the product vendor.

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Many of the Linux server security issues you may experience occur, in part, because they don’t arrive hardened out of the box.. Rather, it’s the user’s responsibility to set up systems that reveal suspicious activities. Without this extra effort, Linux servers can be shockingly vulnerable. Tightening Apache Web Servers Web servers represent the single most multipurpose publically-accessible server application in use today. Apache, in particular, has a lead in market share specifically because of the extremely wide array of functions that it can serve and the ease in which an increasing community of developers can add functionality. This wide scope of functionality, of course, comes with a cost — it increases the probability that the server will contain vulnerable code. Students will learn how to configure Apache security modules and how to configure an Apache webserver to offer only what functionality is used by their site.

Linux Hardening and Security Lessons

Being an independent Linux trainer, author, and consultant he serves his clients all over the world or online from his home country The Netherlands. This course is part of LiveLessons Video Training series on Pearson IT Certification. The video course is also available on the O’Reilly learning platform. Thank you for your interest in Linux Foundation training and certification. Stay up to date with the newest courses, certifications, and promotions from the LF training team. Lab exercises in this course are designed to work either on native hardware, or using a virtual machine , under a hypervisor, such as those in the KVM, VMWare, or Virtual Box families.

Mastering Linux Security And Hardening How Selinux Can Benefit A Administrator

A common occurrence among system administrators is to install the operating system without paying attention to what programs are actually being installed. This can be problematic because unneeded services may be installed, configured with the default settings, and possibly turned on.

We’ll explore the role of Linux hardening and cover 10 best practices you can put into action right away. Linux powers the internet as we know it — it took over the digital world early on and hasn’t let up since then. Linux is the most commonly used operating system for web-facing computers, running on nearly 75% of servers according to Netcraft’s August 2019 data — we’ll cover how to make your Linux servers more secure. Poor file permissions can allow an ordinary user to gain system user privileges or to access/compromise data. An actor with physical access to a Linux machine can usually gain root with trivial attacks.

Perform Security Audits

This module will discuss the foundation of a hardened and secure Linux system which is the installation itself. The concept of this module is to plan, deploy and configure a system for a secure installation of the Linux OS. Time invested going through steps like the ones laid out will return dividends in the future. The surface area of attack will shrink, threats that make it through your system will be Linux Hardening and Security Lessons minimized, and you will have the proper documentation to respond to intrusions and prevent them in the future. Safeguards can be implemented such that email client software does not automatically open or execute attachments. Additionally, the automatic update of workstation software using Red Hat Network; or other system management services can alleviate the burdens of multi-seat security deployments.

Next, you will discover how much traceability you lose where you have not installed the Linux Audit System. Finally, you will explore how to deploy the integrated Identity Management tool, FreeIPA Server on CentOS 7. When you’re finished with this course, you will have the skills and knowledge of Linux Security needed to harden your Linux Servers. Server hardening is a necessary process since hackers can gain access through unsecured ports.

Another category of insecure services include network file systems and information services such as NFS or NIS, which are developed explicitly for LAN usage but are, unfortunately, extended to include WANs . NFS does not, by default, have any authentication or security mechanisms configured to prevent a cracker from mounting the NFS share and accessing anything contained therein.

In this case, Udemy has a messaging system for students / anyone who has an account, and you can send Jason Cannon a message through this system quite easily, even if you haven’t bought LSAHTPSG yet. But, our simple all time favorite way of gauging an instructor’s responsiveness is to simply email the instructor and see if or how they respond. You can see what other students have to say about this in their LSAHTPSG reviews. Obviously, the more highly other students rate LSAHTPSG the better, but no matter what, keep an open mind when reading the reviews, since you might still like a course a great deal that other students dislike. Prior to July 21, 2022, there were 5,706 students enrolled, 2,534 reviews / ratings, and it was overall rated 4.4 out of 5.

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You’ll learn how to take your machines to a state of minimum necessary risk. This hands-on class teaches you how to tighten all major aspects of the operating system for security, balancing this with the purpose of the system and the needs of your organization. You’ll learn how to tune kernel and operating system parameters, deactivate components, and tighten the components that remain. You’ll examine major server applications tightening, including Apache, Sendmail, WU-FTPd, vsftpd, and BIND. Along the way, you’ll understand how external and internal actors use privilege escalation and how you can lessen their odds of gaining root. You’ll also learn to apply key security concepts, from defense-in-depth to least privilege to risk evaluation, to determine what actions you should take and in what order of priority.