Well, I've just tried setting up my 2nd nic to have gateway = 1st nic, and a static ip is similar to 1st nic, and two dns = 1st nic's dns. I think the 2nd nic can go out via 1st nic, but it can't reach Internet, can it? I'm not going connect to anyone who's connecting to the same hub/switch, but I mainly want the 2nd nic to connecting out to the Internet. As I know, Isp offer dynamic ip to user by identifying different nic hardware address, doesn't it? That's why I've such an idea to use my 2nd nic to get another dynamic ip. Is it possible to do so?