I think that they still sell [link|http://www.wingate.com/|WinGate] and you can get a 30 day trial to test it out. Just install it on a machine that has the dial-up modem and ISP account.

If you have a Cable Modem or DSL, I'd reconmend the hardware router box. But if you only have a modem access, I'd reconmend the WinGate or some other software.

Some Router Boxes will take an external modem, but the cost of the Router Box and External Modem will be more than the cost of WinGate.