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Cybersecurity • Level: Beginner

Defensive Cybersecurity & Infrastructure Hardening

Learn the core foundations of network security, Linux server administration, intrusion detection, firewall rules, and defense-in-depth principles.

Duration8 Weeks
Total Lessons32 Lessons
Skill LevelBeginner
EnrollmentOpen Cohort

Course Overview

Understand the mechanics of modern cyber threats and how defenders construct resilient barriers. From packet analysis in Wireshark to setting up automated firewall rules on Linux hosts, this course grounds you in practical defensive operations.

Curriculum Breakdown

1Module 1: Networking & Protocol Fundamentals

  • TCP/IP stack, DNS resolution, routing, and subnetting
  • Packet capture and dissection with Wireshark
  • Common protocol weaknesses and reconnaissance vectors

2Module 2: Linux Systems Security & Hardening

  • User permissions, sudo policies, and SSH key management
  • Configuring Bastion Jump Hosts and isolating network segments
  • UFW and iptables firewall policy scripting

3Module 3: Authentication Logs & Anomaly Detection

  • Parsing auth.log and system journal streams
  • Detecting dictionary attacks, credential stuffing, and scans
  • Automating IP blocking scripts in Python

4Module 4: Security Policies & Incident Response Basics

  • Defense-in-depth architecture standards
  • Basic incident triage and volatile artifact collection
  • Reporting and post-mortem documentation

Prerequisites & Requirements

  • Familiarity with operating systems
  • Curiosity about computer networking
Lead Instructor
AK

Aizaz Khalid

Founder & Cybersecurity Specialist

Guiding you through practical, real-world application architecture and defense strategies directly from client deployments.

Join Upcoming Cohort

Enrollment includes access to recorded lesson modules, practical lab exercises, and mentor code reviews.

Start Defensive Foundations

Covered Stack

LinuxOpenSSHUFW/iptablesWiresharkNmapSuricataPython
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