Win Network Tools is exactly what the name implies - an easy to use collection of network tools geared for assisting you in troubleshooting network-related problems.
You will be able to locate most network issues like connection problems, and TCP problems via the Windows Command Prompt (cmd.exe) which is used to run most network commands.
Win Network Tools has an interface that is very easy to use; everything is located together so you can easily reset TCPIP stack, flush DNS cache, release IP, renew IP, reset Winsock, enable or disable TCP Auto-Tuning, get MAC address, and much more right from the same location.
Simple Port Forwarding works with webpages and not directly with your router making it a safe program to use. Supports 52 Languages and 2600+ routers. Portable version also available.