When the connection is the problem
One-way audio, strict NAT, port forwarding that does nothing, VPNs that will not pass. Different symptoms, mostly the same cause.
-
Carrier-Grade NAT: Why Your Public IP Isn't Yours
Learn what carrier-grade NAT is, how to detect if your ISP uses it, and what you can and cannot fix from your side.
-
Double NAT: What It Is and How to Fix It
Double NAT occurs when two routers translate your traffic. Learn how to detect it, fix it with bridge mode, DMZ, or port forwarding, and know when you can't fix it.
-
Multiple VPN Connections: Why the Second Tunnel Fails
Learn why running multiple VPN connections from one network often fails due to NAT and routing conflicts, and how to fix it.
-
One-Way Audio on VoIP Calls: Causes and Fixes
VoIP call connects but audio only goes one way? Learn the NAT/RTP causes and step-by-step fixes for one-way audio on SIP calls.
-
Open NAT on Console: Fix Strict and Moderate
Learn what NAT types mean, why UPnP fails, and how to get an open NAT on Xbox, PS5, and Switch with port forwarding and router settings.
-
Packet Loss vs Latency: Diagnosing Lag
Learn the difference between packet loss, latency, and jitter, how to measure each, and which network issues you can fix yourself.
-
Port Forwarding: How It Works and Why It Fails
Understand port forwarding: how NAT rules work, why they fail from inside your network, and the four common causes of a broken rule.
-
VPN Passthrough: What It Does and When It Matters
Learn what VPN passthrough is, why PPTP and IPsec need it, and when it's irrelevant on modern routers. Includes troubleshooting and common misdiagnoses.
-
Wi-Fi Keeps Disconnecting: Separating the Layers
Three layers fail differently: the adapter, the wireless link, the internet beyond it. Power saving, band steering and roaming each look like a drop.
beginner