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vpn configuration in win nt40

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3 replies

by mmhrishi

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I'm attempting to allow a few remote users to access their company server from home using internet connections through a VPN using Win2k Professional and win98. They would be logging into a Winnt 4.0 Server, which is behind a dlink router using a static IP.And my nat port 1723 and 47 is forwarded to that server.and this same system i using for mail server and its working fine.
when i tried to connect to vpn server in clients i getting error 721 computer not responding.can u expain wht isthe cause for this.

3 replies

by ayoshi

The VPN will need to connect to a VPN server on your internal network. This server must be visible from the intenet.

For this to happen, you will need to create a static mapping of your NAT interface to allow VPN type traffic (I can't remember the ports used) to go to the NT 4 VPN Server.

If you have more than one IP address, then simply assign both IP addresses to the external interface, and map the second IP address to the VPN server.

Hope this helps.

by stillatit

Things to check:

- Does the vpn server work with a client INSIDE your LAN? (If not, get this working first.)

- Check that your port forwarding is actually there in the router, and did not get lost somehow.

- Check that the router is not filtering these protocols. (Filters are independant of forwarding.)

- Make sure that your client's local IP address is NOT on the same subnet as the server's. For example, if the server NAT address is 192.168.1.42, make sure that if the client is behind a NAT router, his address is NOT in 192.168.1.0. If it is, the vpn server's return packets will get lost, since they will NOT go to the router, being local packets. Have the user change his NAT range to 192.168.2.0.

Good luck.

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