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Understanding VPNs and PPTP
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For Windows Dial-Up Networking Users
If you are using Windows Dial-Up Networking version 1.3, the basic set up steps
are as follows. (Refer to Windows user documentation for details.)
■
Install the PPTP protocol
■
Create a RAS phone book entry for the VPN
A RAS phone book entry is similar to other phone book entries except there is
an IP address in the Phone number field. Once the Phone book entry is
complete, you can double-click the icon to dial into a server that supports PPTP
via any ISP.
Note that protocols required for the private network must be installed on each
PPTP tunnel client as well as PPTP tunnel server.
Establishing a Tunnel via
the ISDN LAN Modem
As with PPP, no configuration is required on the LAN Modem to use PPTP.
However, you must have an ISP configured on the LAN Modem.
Once the client side and server side are configured, you are ready to create a
tunnel. The steps required for creating a tunnel vary depending on which client
software you are using. Refer to the user documentation provided with your PPTP
software to determine how to establish a tunnel. For instance, if you are using
Windows Dial-Up Networking version 1.3, double-click the phone book entry for
the VPN.
Once you attempt to create a tunnel, the ISDN LAN Modem detects this attempt
and automatically places a call to your ISP. Once the call is connected, a tunnel is
established between your workstation and the tunnel server.
You are ready to access a remote private network LAN as if you were connected
locally. Each workstation that wishes to have access to the remote private LAN will
need to create its own tunnel.
Refer to
http://www.remoteaccess.3com.com/support/docs/lanmodem
for more
information. For specific instructions on how to configure a VPN adapter in
Windows 98, 95 or Windows NT, refer to Microsoft’s Web site at
http://www.microsoft.com
. and then enter PPTP in the search field.