I have two ethernet cards installed on my computer. The first one is connected to a NAT firewalled, router/switch. The second is connected to a regular switch. The router assigns NIC #1 with a 192.168.... address. The regular switch provides an IP that begins with 24... from my cable ISP. Both switches (firewalled, and regular) are sending me an internet signal. It seems, though I am not sure, that the internet access from NIC #2 is dominant, because when I use port checking software, it shows the ports being open. When I disable NIC #2 and get my internet from only NIC #1, the ports are closed (firewalled). My curiosity is, when connecting to things like, online games, is there any conflict going on with having two WAN addresses? Or should I just leave it be? If there is a conflict possibly going on, I want to know how to make NIC #2 only accept a WAN connection, and NIC #1 only accept a LAN connection. Please ask questions if you're confused, I CAN clarify for you. Thanks!

Could you clarify the path from each nic to the internet? It would appear you have one nic plugged into the switch which in turn is plugged into the router. The other nic goes to to the router. Is this correct? What is it you are trying to accomplish?