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Linux Network and Host Security

Anthony Nocentino

Take your Linux sysadmin skills to the next level and keep moving along your LFCS/RHCSA and LFCE/RHCE path. This course introduces you to a deeper level of network and system administration. Topics include security concepts and architectures, securing networks and services with Linux, and remote access tools and techniques such as OpenSSH.

Looking to boost your knowledge of Linux abilities as a system administrator? This course, Linux Network and Host Security, introduces you to a deeper level of network and system administration. First, you will look at managing system services with systemd. Next, you will dive deep into system and network performance, where you will learn techniques and tools to monitor system performance. Finally, you will jump into how to manage software on your system and in your data center with advanced packages management and wrap up with sharing data among your systems with NFS and Samba. By the end of this course, you'll know how to drive the most value out of your Linux systems by providing advanced network services and keeping your systems online and performing well.

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What's inside

Syllabus

Course Overview

Introduction and Lab Setup

Linux Security Concepts and Architectures

Securing Hosts and Services - iptables and TCP Wrappers

Securing Hosts and Services - firewalld

Remote Access - OpenSSH

Remote Access - Tools and Techniques

Good to know

Know what's good

, what to watch for

, and possible dealbreakers

Explores industry-standard security concepts and architectures

Deepens understanding of system and network performance

Reinforces core concepts for LFCS/RHCSA and LFCE/RHCE certification paths

Covers advanced package management and data sharing with NFS and Samba

Prerequisite knowledge in system administration is recommended

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Activities

Be better prepared before your course. Deepen your understanding during and after it. Supplement your coursework and achieve mastery of the topics covered in Linux Network and Host Security with these activities:

Review Networking Fundamentals

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Refresh your knowledge of networking principles to strengthen your foundation for advanced Linux network administration concepts.

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Review key networking concepts (OSI model, TCP/IP, subnetting).
Understand different network topologies and protocols.
Practice basic network troubleshooting techniques.

Practice host security configurations

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Solidify your understanding by implementing host security configurations on a local Linux system

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Configure user accounts and permissions
Configure file and directory permissions
Secure SSH and other remote access services

Read 'Linux Administration Handbook' by Evi Nemeth

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Complement the course material by reviewing a classic Linux administration handbook to gain a comprehensive understanding of system management best practices.

View UNIX and Linux System Administration Handbook on Amazon

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Read chapters relevant to the course topics (systemd, performance monitoring, software management).
Take notes and highlight key concepts for future reference.

Nine other activities

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Manage Software Packages with Advanced Package Management (RPM/DEB)

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Follow guided tutorials to master advanced package management techniques, enhancing your ability to maintain and update software.

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Understand package management fundamentals (RPM/DEB).
Install, update, and remove packages using command-line tools (yum/apt).
Manage package dependencies and resolve conflicts.

Monitor System Performance

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Practice using monitoring tools to identify performance bottlenecks and improve system efficiency.

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Use tools like 'top', 'sar', and 'vmstat' to monitor system resources (CPU, memory, disk).
Analyze performance data to identify performance issues.
Tune system settings and configurations for improved performance.

Configure and Administer an OpenSSH Server

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Gain hands-on experience by configuring and managing an OpenSSH server, enhancing your understanding of remote access security.

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Install and configure OpenSSH on a Linux server.
Configure SSH authentication methods (password, key-based).
Manage SSH user permissions and access controls.
Monitor and troubleshoot SSH connections.

Create security vulnerabilities report

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Identify vulnerabilities and propose solutions by performing a security assessment

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Conduct a security scan of a Linux system
Analyze the results and identify potential vulnerabilities
Formulate recommendations to mitigate the identified vulnerabilities

Troubleshoot Linux Networking Issues

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Work through guided tutorials to develop practical skills in diagnosing and resolving Linux networking issues.

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Identify common networking tools and commands.
Analyze network traffic and identify performance bottlenecks.
Configure and manage firewall rules.
Troubleshoot connectivity problems and DNS issues.

Build a secure Linux network environment

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Apply your learning by designing and implementing a secure network environment using Linux

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Plan and design the network architecture
Configure and secure Linux systems in the network
Deploy network services and applications

Configure Linux Security Modules (LSMs)

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Practice hands-on configuration of LSMs to solidify your understanding of Linux security mechanisms.

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Review LSM concepts and architecture.
Configure AppArmor or SELinux on a test system.
Create and apply security policies.

Design and Implement a Network Security Baseline

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Create a comprehensive network security baseline to demonstrate your ability to design and implement secure network configurations.

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Establish security requirements and objectives.
Configure firewalls, intrusion detection systems (IDS), and anti-malware software.
Implement security hardening measures for operating systems and applications.
Document and maintain the security baseline.

Participate in a Linux Security Challenge

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Challenge yourself in a Linux security competition to test your skills and demonstrate your proficiency.

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Identify online Linux security challenges or competitions.
Prepare and gather necessary resources.
Participate in the challenge and attempt to solve security-related tasks.

Career center

Learners who complete Linux Network and Host Security will develop knowledge and skills that may be useful to these careers:

Security Analyst

Security Analysts are responsible for identifying and mitigating security risks. Security Analysts typically need to have a solid understanding of computer security best practices, as well as experience in using security tools and techniques. The Linux Network and Host Security course can help build a foundation for a career as a Security Analyst by providing students with hands-on experience in securing Linux systems and networks.

See salaries and explore the career path for Security Analyst

Cybersecurity Analyst

Cybersecurity Analysts are responsible for identifying and mitigating cybersecurity threats. Cybersecurity Analysts typically need to have a solid understanding of cybersecurity best practices, as well as experience in using cybersecurity tools and techniques. The Linux Network and Host Security course can help build a foundation for a career as a Cybersecurity Analyst by providing students with hands-on experience in managing and securing Linux systems and networks.

See salaries and explore the career path for Cybersecurity Analyst

Penetration Tester

Penetration Testers are responsible for testing the security of computer systems and networks. Penetration Testers typically need to have a solid understanding of computer security best practices, as well as experience in using penetration testing tools and techniques. The Linux Network and Host Security course can help build a foundation for a career as a Penetration Tester by providing students with hands-on experience in managing and securing Linux systems and networks.

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Network Security Engineer

Network Security Engineers are responsible for designing and implementing network security solutions. Network Security Engineers typically need to have a solid understanding of network security best practices, as well as experience in managing and securing networks. The Linux Network and Host Security course can help build a foundation for a career as a Network Security Engineer by providing students with hands-on experience in managing and securing Linux-based networks.

See salaries and explore the career path for Network Security Engineer

IT Auditor

IT Auditors are responsible for assessing the security of computer systems and networks. IT Auditors typically need to have a solid understanding of computer security best practices, as well as experience in auditing and compliance. The Linux Network and Host Security course can help build a foundation for a career as an IT Auditor by providing students with hands-on experience in assessing the security of Linux systems and networks.

See salaries and explore the career path for IT Auditor

Information Security Manager

Information Security Managers are responsible for developing and implementing security policies and procedures. Information Security Managers typically need to have a solid understanding of computer security best practices, as well as experience in managing and securing information systems. The Linux Network and Host Security course can help build a foundation for a career as an Information Security Manager by providing students with hands-on experience in managing and securing Linux systems and networks.

See salaries and explore the career path for Information Security Manager

Security Architect

Security Architects are responsible for designing and implementing security solutions for organizations. Security Architects typically need to have a solid understanding of computer security best practices, as well as experience in managing and securing complex IT systems. The Linux Network and Host Security course can help build a foundation for a career as a Security Architect by providing students with hands-on experience in managing and securing Linux systems and networks.

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Network Administrator

The Network Administrator is in charge of maintaining and repairing computer networks. Network Administrators typically need to have a solid understanding of networking protocols, as well as security best practices. The Linux Network and Host Security course can help build a foundation for a career as a Network Administrator by providing students with hands-on experience in managing and securing Linux networks.

See salaries and explore the career path for Network Administrator

IT Security Specialist

IT Security Specialists are responsible for managing and securing computer systems and networks. IT Security Specialists typically need to have a solid understanding of computer security best practices, as well as experience in managing and securing IT systems. The Linux Network and Host Security course can help build a foundation for a career as an IT Security Specialist by providing students with hands-on experience in managing and securing Linux systems and networks.

See salaries and explore the career path for IT Security Specialist

Security Consultant

Security Consultants are responsible for providing security advice and guidance to organizations. Security Consultants typically need to have a solid understanding of computer security best practices, as well as experience in assessing and mitigating security risks. The Linux Network and Host Security course can help build a foundation for a career as a Security Consultant by providing students with hands-on experience in managing and securing Linux systems and networks.

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Cloud Engineer

Cloud Engineers are responsible for designing, building, and maintaining cloud-based systems. Cloud Engineers typically need to have a solid understanding of cloud computing technologies, as well as experience in managing and securing cloud-based systems. The Linux Network and Host Security course can help build a foundation for a career as a Cloud Engineer by providing students with hands-on experience in managing and securing Linux-based cloud systems.

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System Administrator

The System Administrator is in charge of maintaining and repairing computer systems and networks. System Administrators typically need to have a solid understanding of computer hardware and software, as well as networking and security protocols. The Linux Network and Host Security course can help build a foundation for a career as a System Administrator by providing students with hands-on experience in managing and securing Linux systems.

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DevOps Engineer

DevOps Engineers are responsible for bridging the gap between development and operations teams. DevOps Engineers typically need to have a solid understanding of both software development and operations, as well as experience in automating and streamlining software delivery. The Linux Network and Host Security course can help build a foundation for a career as a DevOps Engineer by providing students with hands-on experience in managing and securing Linux-based systems.

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Chief Information Security Officer (CISO)

The Chief Information Security Officer (CISO) is responsible for overseeing the security of an organization's information systems. CISOs typically need to have a solid understanding of computer security best practices, as well as experience in managing and securing complex IT systems. The Linux Network and Host Security course may be useful for CISOs by providing them with hands-on experience in managing and securing Linux systems and networks.

See salaries and explore the career path for Chief Information Security Officer (CISO)

Forensic Analyst

Forensic Analysts are responsible for investigating and analyzing computer crimes. Forensic Analysts typically need to have a solid understanding of computer forensics techniques, as well as experience in using forensic tools and techniques. The Linux Network and Host Security course may be useful for Forensic Analysts by providing them with hands-on experience in managing and securing Linux systems and networks.

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Reading list

We've selected 12 books that we think will supplement your learning. Use these to develop background knowledge, enrich your coursework, and gain a deeper understanding of the topics covered in Linux Network and Host Security.

Security Engineering

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A comprehensive guide to security engineering, providing a systematic approach to designing, implementing, and evaluating security systems. While not specifically focused on Linux, the principles and concepts discussed are applicable to any operating system.

Security Engineering: A Guide to Building...

Hardcover

Linux Network and Host Security

What's inside

Syllabus

Good to know

Save this course

Activities

Career center

Reading list

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