Implementing advanced OpenWrt-based router configurations for enhanced security, privacy, and remote access capabilities
This networking project has evolved from a single router implementation to a sophisticated multi-router ecosystem, with each device serving a specific purpose while sharing a foundation of enhanced security and privacy features. What began as an exploration into open-source firmware has developed into a comprehensive understanding of network architecture, security best practices, and advanced router configuration.
The project spans three distinct router implementations, each with its own specific purpose:
This project has not only resulted in significantly enhanced network security and privacy but has also provided a deep technical understanding of modern networking concepts, router capabilities, and the implementation of layered security approaches.
Create enterprise-grade network security on consumer-level hardware through open-source firmware customization, enhancing privacy, security, and remote access capabilities.
Initial implementation: June 2021 - September 2022
GL-iNet implementations: Completed March 2025
Network security architect and administrator responsible for research, firmware selection/installation, configuration, security implementation, testing, and ongoing maintenance.
OpenWrt, DD-WRT, AdGuard Home, Tailscale, SSH, DNSSEC, DoT/DoH, VPN protocols, iptables firewall configuration, DNS filtering, Linksys WRT3200ACM, GL-iNet routers.
This project presented significant technical challenges across all implementations. The complexities of network security, combined with the risks of misconfiguration and the steep learning curve of command-line interfaces, made this an ambitious undertaking with no room for error.
My approach focused on thorough research, methodical implementation, and rigorous testing at each step to ensure reliability and security. I started with DD-WRT but transitioned to OpenWrt for its more active development and greater flexibility.
Layered security approach implemented across router configurations, providing defense-in-depth protection
This project followed a methodical approach that evolved over time, with each router implementation building on lessons learned from previous configurations. The process was characterized by extensive research, careful implementation, and rigorous testing to ensure security and reliability.
The project began with extensive research across multiple sources to build a knowledge foundation before modifying expensive router hardware. I started by exploring router capabilities, network security concepts, and open-source firmware options. Initially working with DD-WRT, I later transitioned to OpenWrt after discovering its more active development community, better documentation, and greater flexibility. This research phase involved consulting Linux forums, OpenWrt and DD-WRT documentation, privacy-focused communities, and networking security resources to gather diverse perspectives on best practices.
My first major implementation focused on configuring a Linksys WRT3200ACM with OpenWrt firmware to secure a smart home environment. This phase involved flashing the firmware, establishing secure SSH access, configuring the network topology, implementing VPN tunneling, and setting up DNSSEC-verified DNS with content filtering. I developed a systematic approach to implementation: first establishing basic connectivity, then adding security layers one at a time with thorough testing between each addition. This methodical approach was essential for isolating potential issues and maintaining network stability while enhancing security.
Building on knowledge gained from the smart home implementation, I recently configured a GL-iNet router with enhanced privacy features for my personal use. This implementation refined previous techniques and added new security measures. I configured AdGuard Home with carefully selected blocklists to avoid overblocking while providing robust protection, implemented encrypted DNS (DoT/DoH) with DNSSEC verification, and established a system-wide VPN tunnel. Security testing using external tools (Cloudflare SSL tests, EFF's CoverYourTracks, IP/DNS leak tests) confirmed proper implementation with no privacy leaks and strong tracking protection.
The most recent implementation involved configuring another GL-iNet router specifically for remote PC access, overcoming ISP limitations to enable Wake-on-LAN (WOL) functionality for an upcoming personal server project. This phase required solving the challenge of Carrier-Grade NAT (CGNAT) implemented by some ISPs, which blocks standard port forwarding. I implemented Tailscale directly on the router, configuring subnet routes to allow remote access through a secure overlay network. Package installation required creative troubleshooting when VPN conflicts arose, developing a sequence of stopping services before installations. This router implementation is designed as the networking foundation for a future personal server project.
This multi-stage project achieved significant technical and security improvements, creating enhanced protection for three distinct network environments. Each implementation was rigorously tested using industry-standard security assessment tools to verify proper configuration and protection levels.
Beyond the quantitative metrics, this project delivered substantial qualitative benefits:
"This project transformed my understanding of network architecture and security. What began as a simple desire to enhance network privacy evolved into a comprehensive exploration of security principles, advanced configurations, and cutting-edge networking tools. The knowledge gained has applications far beyond these specific implementations."
— Personal Reflection on Project Impact
This multi-year router configuration project has been a profound technical journey, evolving from basic implementation to sophisticated networking solutions. The progression across multiple router implementations has provided valuable insights into effective approaches, revealed important challenges, and opened new possibilities for future projects.
This project has fundamentally transformed my understanding of networking and security architecture. What began as a straightforward desire to enhance network privacy evolved into a deep technical exploration that built my confidence in tackling complex technical challenges without formal guidance. The methodical problem-solving approach developed during this project—research thoroughly, implement incrementally, test rigorously—has become invaluable in all my technical work. Most importantly, I've gained an appreciation for the profound importance of network security in our connected world and the satisfaction that comes from building systems that protect digital privacy and security.
