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Linux Starlight

Module 5. Networking and Basic Security

Duration: 6 hours

This module ensures you can connect your Linux server to the world securely.

Topics Covered

Section titled “Topics Covered”

This module is divided into the following detailed sections:

5.1 Network Configuration

Section titled “5.1 Network Configuration”
  • Concepts: IP, Netmask, Gateway, DNS.
  • Configuration: Netplan (Ubuntu) and NetworkManager (Rocky).

5.2 Firewalls

Section titled “5.2 Firewalls”
  • Configuring UFW (Ubuntu).
  • Configuring firewalld (Rocky).

5.3 Secure SSH Configuration

Section titled “5.3 Secure SSH Configuration”
  • Setting up Key-based authentication.
  • Hardening sshd_config (Disabling root and password login).

5.4 Security Frameworks

Section titled “5.4 Security Frameworks”
  • Introduction to Mandatory Access Control.
  • SELinux (Enforcing/Permissive) and AppArmor.

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