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NT4.0 VPN Setup

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by tjamison

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I'm hoping someone can give me specific instructions on how to setup an NT4.0 client (windows98) to Server VPN setup over the internet using an ISP. Currently using a proxy server for a firewall for internet security. Informed that I need 2 NIC cards, one for the external LAN(internet) & the other for our internal LAN. I'm not sure this is needed anymore with release of NTSP4. How does DHCP fit into picture. Can I use my local IP addresses or do I need to use IP addresse of the ISP (we have32 reserved from ISP). Should DHCP be installed on VPN server? Currently I can see DHCP IP address assigned to my VPN ports on my DHCP server that services my local workstations (located on PDC). Is this satisfactory or does DHCP have to be installed on VPN and I have to reserve some of the address on my PDC. These are just a few questions, but as much input as possible is welcomed. Also any materials that you know of as far as setup would be useful. Thanks.

3 replies

by shmaltz

First check out www.firstvpn.com.
The setup itself is very easy to get it working is not. On the server side if its behind a firewall you will have to open up the ports to PPTP on the firewall. You will have to install RAS and PPTP on the server first you should install PPTP (this is found under the protocol tab in winnt) then you will install RAS (found under the service tab). If you have an extra machine with a PIII CPU and 128MB RAM than I whould suggest installing windows 2000 server on that mahcien and adding a second NIC to that machine and then use the wizard to setup VPN, Windows2k VPN is much easier to setup and is much more reliable than winNT VPN. However dont connect an existing server directly to the internet only connect onethats going to act only for VPN server. Once its connected to the internet, setup the NIC thats connected to the internett with the IP addresss you got from your ISP then configure it to block all trafick exept for VPN (in winnt its called PPTP filtering, in windows 2k its done automaticly but you will have to isntall the sp for win2k before running the wizard), set it up only with one default gateway (the one your ISP gave you) address. On the NIC thats connected to your LAN enter a local IP address. DHCP is not a problem. If you have an existing DHCP server you can setup the VPN server to use that DHCP server, If you dont have one you can give the VPN server a pool of static IP address to give out to clients.

by shmaltz

When you install it on winnt then when you install RAS the device you will use for RAS is the PPTP/VPN adapters added by the PPTP protocol thats why you have to install PPTP first. On winnt you will have to reaplly the SP after installing PPTP and RAS.

by shmaltz

2 NICs is only required if you connect the VPN server directlly to the internet (which is the recommended way), if you are going to use a computer that already on your network for the VPN server then you dont need 2 NICs you will just have to open the ports on the firewall.
Connecting directlly to the intenet is the way to do it, however there are different ways on how to connect it. If you have a firewall then you can put it either in front of the firewall or behind the firewall or on the same level as the firewall.

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