Network Security Assessment & Defense Implementation Guide

Learn network security fundamentals: scanning with Nmap, traffic analysis via Wireshark, and implementing defenses with pfSense firewall and VPN.

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Network Security Assessment & Defense Implementation

Project 5: Network Security | Modular Assignment No. 5

Prepared by: Aryan Kumar Singh
Amity University Online
Course: IHC – Practical Approach to Cyber Security
Project by: TCS iON

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Introduction & Objectives

Objective:
• Understand basic network security concepts
• Analyze a small office network
• Demonstrate common network attacks
• Implement defenses (Firewall, VPN)

Importance:
Networks connect all systems. Attackers target them first. Securing the network reduces overall cyber risk.

Made by

Network Environment Overview

Network Setup

• Small office network simulation
• Multiple client systems
• Internal server deployment
• Internet gateway configuration

Tools Used

• VirtualBox / VMware: Environment simulation
• Nmap: Network scanning & discovery
• Wireshark: Traffic analysis
• pfSense: Firewall and VPN implementation

Made by

Network Reconnaissance (Scanning)

Definition: Information gathering about network devices to identify active hosts and open ports.

Activity Performed:
• Used Nmap to scan the target network.
• Identified live hosts.
• Detected open ports and running services.

Purpose: To understand network exposure and identify potential attack points.

Made by

Common Network Attacks Demonstrated

Attacks Covered

Unauthorized Port Scanning
Packet Sniffing
Weak Protocol Usage

Impact of Attacks

• Information Leakage
• Network mapping by attackers
• Increased attack surface

Made by

Protocol Attack Demonstration

Attack Description:
Observed unencrypted traffic and captured packets using Wireshark.

Findings:
• Plain text data visible in the stream
• Sensitive information exposed without encryption

Risk:
Attackers can intercept and read network communication easily.

Made by

Traffic Analysis & Monitoring

Process:
• Captured network packets
• Analyzed protocols and data flow
• Identified suspicious traffic patterns

Benefits:
• Helps detect anomalies
• Improves visibility into network behavior
• Essential for identifying intrusions early

Made by

Firewall Configuration (pfSense)

Implementation:
Installed pfSense and configured inbound/outbound rules.

Security Controls Applied:
• Blocked unnecessary ports
• Allowed only required services
• Restricted unauthorized access

Result:
Significantly reduced the network attack surface.

Made by

VPN Configuration

What is a VPN?
A secure encrypted tunnel over the internet.

Setup & Configuration:
• Configured VPN using pfSense
• Enabled secure remote access capabilities

Key Benefits:
• Protects data in transit from interception
• Secures remote connections against eavesdropping

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Overall Network Security Architecture

Network Scanning & Monitoring

Firewall Protection (Traffic Filtering)

Encrypted VPN Communication

Strict Access Control Policies

Security Outcome:
Improved confidentiality, integrity, and better control over specific network access points.

Made by

Key Findings & Outcomes

• Networks are highly vulnerable without constant monitoring.
• Unencrypted traffic presents a major data risk.
• Firewalls and VPNs are essential filters that significantly improve the security posture.

Final Outcome:
The network transitioned from an exposed state to a secure, controlled, and monitored environment.

Made by

Conclusion

Network security is critical for modern organizations. While basic security controls can reduce major risks, proper configuration and continuous monitoring are essential for long-term safety.

Final Thought:
This project demonstrated a practical understanding of network security fundamentals, from identifying vulnerabilities to implementing robust defenses.

Made by

Personal Reflection

"This project helped me understand how network attacks occur and how attackers exploit weak configurations. Scanning and traffic analysis provided a clear view of network exposure.

The main challenge was understanding traffic flow and firewall rules. Configuring pfSense and VPN bridged the gap between theory and real-world defense.

Overall, this assignment significantly strengthened my practical knowledge of network security controls."

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Network Security Assessment & Defense Implementation Guide

Learn network security fundamentals: scanning with Nmap, traffic analysis via Wireshark, and implementing defenses with pfSense firewall and VPN.

Network Security Assessment & Defense Implementation

Project 5: Network Security | Modular Assignment No. 5

Prepared by: Aryan Kumar Singh Amity University Online Course: IHC – Practical Approach to Cyber Security Project by: TCS iON

Introduction & Objectives

Objective: • Understand basic network security concepts • Analyze a small office network • Demonstrate common network attacks • Implement defenses (Firewall, VPN) Importance: Networks connect all systems. Attackers target them first. Securing the network reduces overall cyber risk.

Network Environment Overview

Network Setup

• Small office network simulation • Multiple client systems • Internal server deployment • Internet gateway configuration

Tools Used

• VirtualBox / VMware: Environment simulation • Nmap: Network scanning & discovery • Wireshark: Traffic analysis • pfSense: Firewall and VPN implementation

Network Reconnaissance (Scanning)

Definition: Information gathering about network devices to identify active hosts and open ports. Activity Performed: • Used Nmap to scan the target network. • Identified live hosts. • Detected open ports and running services. Purpose: To understand network exposure and identify potential attack points.

Common Network Attacks Demonstrated

Unauthorized Port Scanning

Packet Sniffing

Weak Protocol Usage

Impact of Attacks

• Information Leakage • Network mapping by attackers • Increased attack surface

Protocol Attack Demonstration

Attack Description: Observed unencrypted traffic and captured packets using Wireshark. Findings: • Plain text data visible in the stream • Sensitive information exposed without encryption Risk: Attackers can intercept and read network communication easily.

Traffic Analysis & Monitoring

Process: • Captured network packets • Analyzed protocols and data flow • Identified suspicious traffic patterns Benefits: • Helps detect anomalies • Improves visibility into network behavior • Essential for identifying intrusions early

Firewall Configuration (pfSense)

Implementation: Installed pfSense and configured inbound/outbound rules. Security Controls Applied: • Blocked unnecessary ports • Allowed only required services • Restricted unauthorized access Result: Significantly reduced the network attack surface.

VPN Configuration

What is a VPN? A secure encrypted tunnel over the internet. Setup & Configuration: • Configured VPN using pfSense • Enabled secure remote access capabilities Key Benefits: • Protects data in transit from interception • Secures remote connections against eavesdropping

Overall Network Security Architecture

Network Scanning & Monitoring

Firewall Protection (Traffic Filtering)

Encrypted VPN Communication

Strict Access Control Policies

Security Outcome: Improved confidentiality, integrity, and better control over specific network access points.

Key Findings & Outcomes

• Networks are highly vulnerable without constant monitoring. • Unencrypted traffic presents a major data risk. • Firewalls and VPNs are essential filters that significantly improve the security posture. Final Outcome: The network transitioned from an exposed state to a secure, controlled, and monitored environment.

Conclusion

Network security is critical for modern organizations. While basic security controls can reduce major risks, proper configuration and continuous monitoring are essential for long-term safety. Final Thought: This project demonstrated a practical understanding of network security fundamentals, from identifying vulnerabilities to implementing robust defenses.

Personal Reflection

This project helped me understand how network attacks occur and how attackers exploit weak configurations. Scanning and traffic analysis provided a clear view of network exposure. The main challenge was understanding traffic flow and firewall rules. Configuring pfSense and VPN bridged the gap between theory and real-world defense. Overall, this assignment significantly strengthened my practical knowledge of network security controls.

network-security
cybersecurity
pfsense
wireshark
nmap-scanning
firewall-configuration
vpn-setup
it-security

Network Security Assessment & Defense Implementation

Project 5: Network Security | Modular Assignment No. 5

Introduction & Objectives

Network Environment Overview

Network Setup

Tools Used

Network Reconnaissance (Scanning)

Common Network Attacks Demonstrated

Attacks Covered

Impact of Attacks

Protocol Attack Demonstration

Traffic Analysis & Monitoring

Firewall Configuration (pfSense)

VPN Configuration

Overall Network Security Architecture

Key Findings & Outcomes

Conclusion

Personal Reflection

DESIGNER-MADE PRESENTATION, GENERATED FROM YOUR PROMPT

Network Security Assessment & Defense Implementation Guide

DESIGNER-MADE
PRESENTATION,
GENERATED FROM
YOUR PROMPT