Overview What You Will Learn Curriculum Instructor

Course Overview

Firewalls are essential components of network security, controlling incoming and outgoing traffic to protect systems from unauthorized access and malicious activity. Understanding how firewalls work and how attackers may identify weaknesses is important for penetration testers and security professionals. Tools such as pfSense, iptables, Kali Linux, Nmap, and Scapy help assess firewall configurations, evaluate network defenses, and identify security gaps in controlled environments. This course begins with an introduction to firewalls and the setup of an isolated virtual lab using pfSense, an iptables Linux host, and Kali Linux. It covers firewall fundamentals, penetration testing methodologies, reconnaissance, firewall discovery, architecture fingerprinting, access control rule analysis, and misconfiguration identification. The course then explores firewall bypass techniques involving port redirection, covert channels, HTTP and DNS tunneling, packet manipulation, IP spoofing, man-in-the-middle demonstrations, and lab-isolated denial-of-service proof-of-concepts. It also covers Python and Scapy automation, penetration testing documentation, risk assessment, remediation recommendations, firewall hardening, and preparation for further learning toward the EC-Council C|PENT certification. You will gain practical skills in firewall assessment, penetration testing, controlled bypass testing, automation, vulnerability reporting, and network defense improvement. The necessary resources for this course are in the "Resources" section of Video 1.1.

What You Will Learn

  • Deploy pfSense, an iptables Linux host, and Kali Linux virtual machines for controlled firewall security testing.
  • Use tools such as Nmap, Netcat, Hping3, and traceroute to identify firewall behavior, analyze network responses, and examine access control rules.
  • Identify common misconfigurations and understand techniques involving tunneling, port redirection, packet fragmentation, spoofing, and other controlled security tests.
  • Develop reusable scripts to assist with firewall rule discovery, packet testing, and controlled security assessment within the isolated lab.
  • Prepare penetration testing reports, prioritize risks based on business impact, recommend firewall hardening measures, and understand pathways toward further penetration testing certification.

Program Curriculum

  • Firewalls in 10 Minutes
  • Building the Lab
  • Deploying pfSense and iptables
  • Kali Attacker VM and First Sanity Scan
  • Section Summary
  • Chapter 1 Quiz

  • Why Firewalls Fail
  • Pentest Types: Black, Grey, White Box
  • End-to-End Methodology
  • Risk Factors, Scoping, and Rules of Engagement
  • Attack Strategy and Success Criteria
  • Section Summary
  • Chapter 2 Quiz

  • Locating the Firewall
  • Traceroute and TTL Analysis
  • Nmap Port Scanning
  • Netcat Banner Grabbing
  • ACL Enumeration via Response Inference
  • Section Summary
  • Chapter 3 Quiz

  • Architecture Fingerprinting with Hping3 and Nmap
  • Testing Rules from Outside
  • Discovering real-world misconfigurations
  • Firewalking
  • Building a Rule Map You Can Attack
  • Section Summary
  • Chapter 4 Quiz

  • Port Redirection
  • Covert Channels: ICMP and TCP Header Abuse
  • HTTP Tunneling
  • DNS Tunneling with Iodine and dns2tcp
  • Choosing the Right Tunnel for the Engagement
  • Section Summary
  • Chapter 5 Quiz

  • Malformed and Fragmented Packets
  • IP spoofing against firewall rules
  • MiTM with Ettercap and Bettercap
  • Lab-isolated DoS Proof-of-Concept
  • Ethics, Blast Radius, and Responsible Testing
  • Section Summary
  • Chapter 6 Quiz

  • Documenting Findings with Business Impact
  • Writing the Report
  • Reusable Pentest Checklist
  • Hardening Best Practices
  • The Path to EC-Council C

  • PENT
  • Section Summary
  • Chapter 7 Quiz
Load more modules

Instructor

Dimitris Amprazis

Dimitris Amprazis has Excellent communication and consultating skills with proven abilities in resolving networking, hardware & software related issues. Ha is proficient in Linux Operating system configuration, utilities, and programming. He has extensive knowledge of hardware, software and networking technologies to provide a combination of analysis and support. Dimitris is highly killed in organizing meetings and reviews. Skills: 1. Kali Linux, Parrot Secutiy OS, CentOS, Fedora, Ubuntu, Linux Mint 2. Wireless penetration testing - WPA, WPA2, WEP 3. Network Vulnerability scan and penetration testing.Web 4. Web Application security testing, Vulnerability Assessment, penetration testing and generating reports using tool 5. Password hash cracking MD5, SHA1,SHA2, etc, 6. Experience with tools: Aircrack-ng, Hydra, Burpsuite, Metasploit. OWASP-ZAP, Nmap, Wireshark, Sqlmap, John-Ripper, Nesuss, Nikto, Dirp. 7. Steganography 8. Integration experience on Security information and Event management solutions (SIEM). 9. Network traffic analysis, supervision, filtration and packet dissection with WireShark

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