Ok, this is what I did.
First of all, I have only one NIC on the server, because I have a Firewall and a router to get to Internet.
You only need 1 public IP address so you can get to your VPN Server.
I can only explain what to do in my case, but I guess you can translate it to your case.
First of all, you need to install the remote access. Go to Control Panel--> Config Server--> Network--> Remote Access (I'm translating from a spanish W2000, so excuse me if something ain't right).
It will ask you to choose a config, choose VPN.
Now a new window shows all the protocols to use with VPN.
You should have at least TCP/IP on the window.
Now choose the interface. In your case you should choose the ADSL interface, or the <No Internet> if you have a design like mine.
Now you can use DHCP or a IP pool. I rather use a IP Pool, but if you want to use DHCP and you have a DHCP server on your LAN, go ahead and use it.
Now you can use a Radius server (IAS). I didn't have one, well I do but is one from CISCO and I didn't wanna mess it with this.
Now you gotta put the static routes. Go to Control Panel-->Administrative tools-->Routing & remote access.
go to routing IP and add a new rute. You should have a new route to get to all your LAN. Let's say that your private LAN is 10.40.0.0 mask 255.255.0.0 and your gateway is 10.40.0.2, then you will put a route like 10.40.0.0 mask 255.255.0.0 gateway 10.40.0.2.
If you wanna let them get out to Internet, use a route like 0.0.0.0 0.0.0.0 gateway internet_gateway.
Ok, now you shoul config the ports. Basically you have 128 ports for PPTP and 128 for L2TP. If you are using W95,98,NT clients you can only use PPTP for VPN protocol.
Go to Ports, click with right mouse button and choose config. There you can change the number of ports.
Now change the remote access directives (I think that's the name in english, is the 5th option. Add a new one. Name it VPN access, and add the next ones: NAS-Port_Type=Virtual(VPN) and Tunel-Type=Point-to-Point Protocol(PPTP).
Now close the remote access window, go to a command shell and execute MMC.
this will update the ip routes table of the server.
In the firewall you must let the ports 1723 and 47 to have access from outside and to outside so the VPN packets can pass the firewall to get to the VPN server inside the LAN.
You must add a new group, named it VPN if you like, and a new user that must have privileges to remote access.
Ok, now the VPN client. You should first dial your ISP access and once you are on Internet use the VPN. If you don't have a VPN adapter on the Win95 you must get the file named msdun13.exe
It will ask you the server address. Use the public IP of your ADSL and there you go..
By the way, if you wanna see all the computers on the Private LAN with the Network Place icon from w95, you should not use a domain connection and your computer must have for Workgroup the domain of your Private LAN.
Hope this helps a little.
