Have you ever wondered how to simulate real-world internet access scenarios in a virtual environment? In this blog, I’ll show you how to seamlessly configure a FortiGate firewall in GNS3, transforming your lab setup into a powerful tool for mastering network security. By the end of this guide, you’ll learn how to create a lab … Read more
Why Is My Router Not Forwarding Packets — Even Though the Route Exists? “I’ve configured the route. It shows in the table. So why is the traffic still not flowing?” If you’ve asked yourself this question — probably while stress-refreshing a ping or blaming the firewall (again) — you’re not alone. It’s one of the … Read more
We’ve all been there. The network breaks, users complain, apps stop working… and your brain goes: “Wait, is this a routing issue or a switching issue?” It’s a common challenge. Routing and switching are two sides of the same coin — and when something breaks, the symptoms can look the same. But treating one like … Read more
You’re looking at your router’s configuration, trying to figure out why traffic is going a certain way. You’ve configured static routes, OSPF is running, maybe even EIGRP is chiming in. Suddenly, you’re asking yourself: “Wait… the route is there, but it’s not being used. Is it because of administrative distance? Or is it about the … Read more
You can ping the server. You can traceroute to the destination. But the app still doesn’t work. Why? You’ve ruled out routing, so now you’re stuck asking: “If ping works, why is the app still failing?” Great question — and one that every network admin, engineer, or IT support person has faced. In this blog, … Read more
You’ve got OSPF running in one part of the network, EIGRP in another, and a handful of static routes thrown in for good measure. What do you do? You set up redistribution — the magical bridge between protocols. Everything works… until it doesn’t. Suddenly, your routes are flapping, loops appear, traffic drops, and someone says: … Read more
How Traceroute is actually work ? Traceroute Lies? Why You Shouldn’t Trust It Blindly During Troubleshooting You run a traceroute to figure out where your packet is getting stuck.You expect it to be your secret weapon — a perfect path map.But instead, it shows missing hops, timeouts, and inconsistent results. And you think: “Wait… is … Read more
Understanding Every Field Like a Pro Let’s be honest: You’ve typed show ip route more times than you can count. But do you fully understand everything it shows? Most of us glance at the route and think: “Oh yeah, it’s there. It’s working.” But the routing table is more than just a list of destinations … Read more
The story of how the Internet learned to route itself and how it still does today. Wait… BGP? Isn’t That Just for ISPs? If you’re a network engineer, you’ve probably heard the term BGP thrown around a lotsometimes with fear, sometimes with awe. Maybe you’ve even asked yourself: “Why does everyone say BGP is so … Read more