Loading of NT Server

This answer will need more than 150 points for sure ... there are some ways to do it, as soon as you add more points I will help you

cheers,
@lberto

1. Load NT Server. Simple, boot from the Windows NT Server 4.0 CD and load it.

While loading, ensure you set-up both the LAN cards. Give them 2 different ip addresses, like 192.168.0.1 and 192.168.0.2

2. Once loaded you'll have to use some third-party software to do the Internet connection sharing (proxying), as NT Server 4.0 by itself doesn't have the capability. Windows NT Server 2000, 2003 have it - and so does Windows 98, 2000 & XP. It's called ICS (Internet connection sharing).

3. Set-up (physical cables) one of the Lan cards to connect to the Internet or Router. The other should connect to the Internal LAN - Switch/Hub whatever you have.

4. Set-up (install) the third-party software (WinProxy, Wingate, whatever) & configure it in such a way that it's set to "Internet access" on the card connected to the Internet/Router (by IP Address)and Internet cannection sharing on the card connected to the Lan.

5. On the client systems, set the IP Address of the Server card connected to the LAN as the address of the proxy.

Done.