Network Troubleshooting Guides
Practical, tested explanations of how to find out what is actually wrong with a network connection — and how to prove it to whoever needs to fix it.
What Causes Packet Loss, and How to Fix It
Packet loss has a handful of common causes, from Wi-Fi and home hardware to ISP congestion and routing. Here is how to work out which one you have, and what actually fixes each.
How to Prove Packet Loss to Your ISP
Support will tell you to reboot the router. Here is the evidence that ends that conversation — what to measure, how to capture it on Windows, macOS or Linux, and how to present it so the ticket gets escalated.
How to Test For and Fix Bufferbloat
Bufferbloat is why your connection falls apart the moment someone starts an upload. It is measurable in a minute and, unusually for network problems, genuinely fixable at your end.
Why Your Ping Is High and Games Lag
Rubber-banding, hit registration problems and sudden spikes are usually not bandwidth. Here is what actually causes them, how to measure which one you have, and what genuinely helps.
When DNS Is Slow or Not Resolving
DNS failures look like everything else being broken. Here is how to confirm DNS is actually the problem, find which part of the chain is failing, and fix it.
Diagnosing Call Quality for Remote Workers
A structured way for IT teams to find out why one employee's calls keep failing — what to measure, what the evidence rules out, and how to close tickets you cannot fix.
Reverse Traceroute: How to Test the Return Path
Your traceroute only measures one direction. When the outbound path is clean but the connection still breaks, the evidence usually points at the return path — and here is how to actually measure it.
Your Speed Test Says 500 Mbps. Your Calls Still Drop.
A speed test measures throughput. Calls fail because of packet loss, jitter and latency under load — three things it cannot see. Here is how to measure each one and what to do about it.
How to Tell If Your Network Is Decrypting Your HTTPS Traffic
TLS interception is standard on corporate and school networks, and the padlock does not rule it out. How it works, how to detect it, and what it does and does not expose.
Measure before you guess
Run a full connection test — packet loss, latency, jitter and a hop-by-hop path trace in one pass. No install, no account.
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