In this project, I configured a full network topology by performing subnetting, IP addressing, OSPF routing, and ACL setup using Cisco Packet Tracer. I started by subnetting the main network 192.168.22.192/26 into three /26 subnets for PCs and the secondary network 10.10.10.240/28 into four /28 subnets for router interconnections. I assigned IP addresses to all PCs and router interfaces according to their respective subnets, labeling each device for clarity and smooth configuration management.

Next, I configured OSPF (Open Shortest Path First) on all routers (R1, R2, and R3) using unique Router IDs (4.4.4.4, 5.5.5.5, and 6.6.6.6) and defined network advertisements for both the main and tiny subnets. I set a default route on R3 pointing to the ISP router and redistributed this default route into OSPF, ensuring that R1 and R2 could dynamically learn the route to external networks. I verified the routing configuration by running ‘show ip route’ and performing successful ping tests from all PCs to the external address 5.5.5.5.

Finally, I implemented Access Control Lists (ACLs) to enforce traffic restrictions based on the project’s security requirements. I configured ACLs on R1, R2, and R3 to control which PCs could access the webserver, limited unnecessary outbound traffic, and ensured subnet isolation where required. After applying the ACLs to the correct interfaces, I verified their effectiveness through ping tests and confirmed that only permitted traffic could flow between subnets and towards the webserver. This project showcased my skills in advanced IP planning, dynamic routing, network security enforcement, and structured troubleshooting.