Summary: For those who don't know if you have a modem and a router as two separate devices conjoined this could create a problem while you are attempting to port forward. Right about now you may be thinking of buying a modem and router that are combined into the same device, but there is no need for this you can set your modem into bridge mode which can fix your port forwarding problem.
What Causes The Problem: The problem between the modem and router is created when the modem is creating it's own network and the router is also creating it's own network. This results as a network inside a network which will ruin your port forwarding because it will be blocked by the other network.
What Can I Do: For this the best thing to do is contact your local internet provider. Tutorials are less common on this because the wide variety of modems. Before you call your internet provider though you should have your modem disconnected from your router and wired directly into your computer(so you will not have to rely on WIFI or internet connection). When you call you should also know your the User name and Password for your modem and internet provider account.
Cautions: Before changing any settings on your router or modem(if not provided by internet provider) Write down the settings.
If you would like to know a little more about bridge modes effects visit this website [url]http://www.smartbridges.com/education/print-ready.asp?id=325[Here/url]
