GNS3 is a great tool for simulating network environments for training or experimentation. It lets you diagram and build virtual networks – and even lets you use real virtual machines and emulates actual CISCO routers. It’s awesome!
Somehow, I’ve always had trouble getting my virtual networks connected to the outside world. I’ve wasted hours futzing around with loopback adapters and bridges — always fruitlessly. My little virtual networks have always been stuck in their own virtual world with no way to get outside.
Until now! I stumbled on an excellent tutorial on Jesin’s Blog that really breaks the process down step-by-stop. It’s surprisingly easy once you actually know what you’re doing!