First identify the IP destination address of the sites your applications connect to. For example
Scottrade = 18.104.22.168 (you can do this by opening a CMD window in W7 and then using the NSLOOKUP utility:
c/> nslookup scottrade.com Enter
Do this for as many applications you are concerned with. then decide which connection you want to use for each app. Make two lists, apps for
NIC A, and apps for
Next, decide which NIC you want to use for your DEFAULT gateway (you can only have one DG even if you have multiple NICs in W7) then display your PC's routing table: in a CMD window type:
The top of the resulting display will show your interfaces: physicals first and logicals last. Below that you will see the IPv4 routing table. Look at the FIRST LINE of the table. This is your CURRENT default gateway, NOTE which interface it is attached to (look at the "interface" column)...now the FUN part!
Take your lists and assign list
A to ONE of your interfaces, and list
B to the OTHER interface....decide also whether your DEFAULT Gateway will be on
Now, For whatever list DOES NOT contain the default gateway, you need to ADD HOST ROUTES to the routing table. For example, if you want to access
scottrade on the NIC that does NOT have the default gateway, at the CMD line you will add the following:
C/> Route Add 22.214.171.124 Mask 255.255.255.255 IF
<ip address of your selected NIC> -p
-p at the end...if you do not do this W7 will "forget" this route on reboot.