Omar D. Sanchez

A comprehensive GNS3 simulation of a resilient, dual-site enterprise network using a three-tier architecture. Implements OSPF, HSRP, NAT, and advanced Layer 2 security.

Goal To design and build a complete enterprise network from the ground up in GNS3. It serves as a practical showcase of my mastery of core routing, switching, and security principles, integrating key technologies like OSPF, HSRP, and advanced Layer 2 security to create a resilient and scalable infrastructure.

A comprehensive capstone project involving the design, implementation, and testing of a secure, multi-site enterprise network. The architecture features a collapsed-core design, a site-to-site IPsec VPN, and high availability with HSRP. The network utilizes a hybrid routing scheme with BGP for external connectivity and OSPF for internal routing, all supported by a full suite of centralized network services and a multi-layered security model including firewalls, ACLs, and 802.1x.

Goal To demonstrate end-to-end network engineering capabilities, from initial architectural design and IP planning to advanced routing, high-availability, and defense-in-depth security implementation in a simulated enterprise environment.

A project demonstrating core system administration skills, including the configuration of DHCP and DNS servers, and the implementation of Active Directory for organizing and securing network resources through Group Policy.

Goal To showcase proficiency in managing foundational enterprise services like Active Directory, DNS, and DHCP, which are critical for any network infrastructure.

A project showcasing the use of Windows Performance Monitor to baseline network metrics and Wireshark to perform packet sniffing on a file transfer between a client PC and a server, demonstrating traffic analysis skills.

Goal To establish a foundational ability to use industry-standard tools like Performance Monitor and Wireshark for network traffic collection and packet-level analysis.

A demonstration of network reconnaissance techniques using tools within Kali Linux, including netdiscover and nmap, to perform host discovery and scan for open ports on a target server in a virtualized environment.

Goal To confirm my practical knowledge of network mapping and security assessment techniques used to identify active devices and potential vulnerabilities.

A lab scenario focused on network forensics where I utilized troubleshooting tools and methodologies to diagnose a connectivity issue, identify the root cause, and implement a verifiable solution.

Goal To demonstrate a systematic and meticulous approach to network troubleshooting, moving from issue identification and analysis to successful resolution.

A troubleshooting lab where a misconfigured firewall Access Control List (ACL) was disrupting server connectivity. The project involved analyzing the rule set, identifying the incorrect entry, and applying a fix to restore proper traffic flow.

Goal To solidify and demonstrate an understanding of firewall rule processing and the ability to troubleshoot complex connectivity issues caused by ACL misconfigurations.

A lab scenario where a recent DNS server change caused a service outage for a group of users. I worked through the problem by gathering information, identifying the scope of the issue, and implementing the correct DNS changes to resolve it.

Goal To showcase methodical troubleshooting by using available information to pinpoint a DNS configuration error and apply the correct fix to restore service.

A distraction-free web app to help you focus on creating and completing tasks. Built using streamlit.

Goal To gain familiarity with the streamlit library and use it to develop python web applications.

A website built entirely in Python to showcase coding projects and apps.

Goal Use knowledge learned to showcase my learned skills and abilities with networking and python.

A flashcard app built in Python. Minimal functionality built in. MVC design pattern used with Tkinter as the GUI.

Goal Practice working with csv data using the Pandas module.

A password manager built in Python. Support password generation and login search and lookup. MVC and Tkinter.

Goal Learn data structures and manipulation using the pandas module, reading from and saving to files.

A version of snake created in Python using the turtle module.

Goal Gain knowledge of an event-based design and introduction to OOP fundamentals.

A pomodoro timer. Cycles between 25-min and 5-min intervals and finally one last 20 min section.

Goal Gain familiarity with simple UI design concepts and working with timers to create a realistic clock.

An interactive game where the user inputs state names and if correct the game will write the location on a map. Keeps track of which states need to practiced.

Goal Learn interactive design and I/O management, and file handling.

A guizero-based Tic-Tac-Toe game. Uses colors instead of symbols to track player turns.

Goal Implement learned MVC skills, gamestate using @abstractmethod and general logic engagement.