Simple Network Building with Packet Tracer

This project demonstrates the design, configuration, and security testing of a basic network topology using Cisco Packet Tracer, as part of my cybersecurity learning experience with 10Alytics.

🛠️ Tools Used

• Cisco Packet Tracer (for network simulation and device configuration)

📚 Project Overview

• Built a simple network topology with a server, switch, and three PCs.
• Assigned unique IP addresses within the 192.168.0.x/24 subnet.
• Verified network connectivity using ping and real-time messaging.
• Configured a firewall on the server to block ICMP (ping) traffic.
• Tested and confirmed that ICMP traffic was successfully blocked post-configuration.

🖥️ Devices and IP Assignments

Device	IP Address	Subnet Mask
DAVIDSERVER0	192.168.0.1	255.255.255.0
DAVIDPC0	192.168.0.2	255.255.255.0
DAVIDPC1	192.168.0.3	255.255.255.0
DAVIDPC3	192.168.0.4	255.255.255.0

🔒 Key Security Configuration

• Implemented a firewall rule to block ICMP traffic to protect against reconnaissance attacks.
• Verified firewall effectiveness by conducting post-configuration ping tests.

📈 Key Takeaways

• Gained hands-on experience with IP addressing, subnetting, and device configuration.
• Understood how basic firewall rules enhance network security.
• Learned how to troubleshoot connectivity issues through practical testing.

🧩 Challenges Faced

• Encountered an issue where the server webpage was inaccessible post-firewall configuration — identified firewall rule impacts and planned for further research and improvement.

🚀 Future Improvements

• Explore more granular firewall configurations to allow HTTP/HTTPS traffic while restricting undesired protocols.
• Implement VLANs and additional layers of security.

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