Well what happen is I bought this router at a computer shop from a friend. The modem was originally connected to one computer directly to the nic. I installed the router and configured it plus three computer to be on the internet. None would connect to the internet, but a network was working between the three. I disconnected the modem from the router and connected it to one computers nic without power cycling anything and the internet worked. I called my friend that sold me the router and told him my situation and he said that mediacomm my provider would have to change a mac address. So I call Mediacomm I told the tech what my friend told me and the tech told me that was exactly right. That tech changed some settings while we were on the phone, which I assumed was a mac address, then presto my internet was working on all computers. I my knowledge isn't much advance on networking and internet protocols, but that's what happened.