This document outlines a graduation project to understand how public WANs work, research routing protocols and IPsec, implement an IPsec VPN over a simulated WAN topology, and analyze secure and unsecure TCP streams. The project will use GNS3 to emulate Cisco IOS and create a graphical network simulator combining virtual and real environments, along with Wireshark for network analysis and troubleshooting. The abstract indicates that securing VPN tunnels is important for organizations using public networks, and that IPsec is a key protocol for achieving security goals when connecting over WAN links.