Connecting to 2nd NIC from another computer

Hello,

I have a Vista64 machine with two NICs. The one I use for outbound traffic is the only one with a default gateway.

I can ping the IP of the second one from this computer, but not from any other computer.

I share a large amount of data from this machine on a dedicated RAID volume and I want people to connect via that second NIC so that my main NIC is not clogged with traffic.

How can I make this work?

Thanks!