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Step-by-Step: Configuring Route-Based IPsec VPNs on Cisco IOS

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As a business evolves from a small local operation into a large enterprise, its technological and security requirements scale rapidly. Opening international branch offices and establishing third-party vendor partnerships mean that users across the globe suddenly need constant, reliable access to centralized servers in the corporate HQ, private data centers, or cloud environments.  Historically, companies relied on dedicated leased lines (like MPLS) to achieve this. However, leased lines are notoriously expensive, slow to provision, and lock businesses into rigid carrier contracts. This is where Site-to-Site VPNs come into play. By leveraging standard, cost-effective internet connections, a Site-to-Site VPN creates a secure, encrypted tunnel over the public internet, allowing remote locations to access corporate resources as if they were physically present on the local network. In this guide we will look into how to setup a Route-Based VPN which is easier to configure and manage tha...
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How to Build a Dedicated GNS3 Server on Ubuntu 24.04

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GNS3 is an industry-standard tool used by students and network professionals alike for emulating complex network environments. While it runs natively on Linux distributions with virtually no issues, Windows users often face frustrating limitations when trying to emulate modern appliances from various vendors. To run heavy network emulations on Windows, the official recommendation is to use the GNS3 VM running inside VMware Workstation. However, this creates a massive headache for modern Windows users. If you are running Docker, WSL2 (Windows Subsystem for Linux), or Hyper-V, Windows requires the "Virtual Machine Platform" feature to be enabled. Historically, this feature violently clashes with VMware, preventing the GNS3 VM from booting or causing massive performance drops. The ultimate workaround? Stop fighting Windows. In this guide, we will learn how to bypass these nested virtualization issues entirely by building your own dedicated GNS3 Server on a native Linux backend....
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How to Build a NetBox Lab on Ubuntu 24.04 Using Docker (Step-by-Step)

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NetBox is an open-source tool widely considered the industry's go-to "Source of Truth" for IP Address Management (IPAM) and Data Center Infrastructure Management (DCIM). It allows network administrators and engineers to maintain dynamic, centralized documentation of a network's current state, unlocking the ability to automate device configuration, provisioning, and deployment. Whether you are a student exploring network management or an engineer building an emulation lab, having a safe sandbox to experiment in is invaluable. This guide will demonstrate how to successfully deploy an isolated NetBox lab environment on Ubuntu 24.04 using Docker. Prerequisites  To follow along with this guide, make sure you have the following ready: Host Environment : A local hypervisor (like VMware or VirtualBox) or a cloud VPS. (Tip: If you need a cloud host, you can use my DigitalOcean referral link to sign up and get $200 in free credits!) Operating System : A fresh installation of U...
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