
Chapter 3 Installing Applications 71
using an enhanced Internet Generic Routing Encapsulation Protocol Version 2
(GRE V2). GRE is protocol type 47. Control packets (for status inquiry and
signaling information) are transmitted and received over a TCP connection.
The TCP port used is 1723. Both of these packet types must be able to reach
the ExtendNet VPN and may require some configuration of a router and/or
firewall (if present and filtering) at the ExtendNet VPN site.
K
Client configuration. Because the ExtendNet VPN uses PPTP to enable remote
access to a LAN over the Internet, each client must be configured to utilize
PPTP. Installing the Microsoft software varies by operating system (either
Windows 95, Windows 98, or Windows NT) but is detailed in the Extended
Systems VPN User’s Guide-Remote Setup.
Installation
Û
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Û To install and configure the ExtendNet VPN server
1. Connect the ExtendNet VPN to the LAN with 10Base-T, 10Base-2, or
100Base-TX.
2. Install the InterprEYES discovery and management software on a Windows
server.
InterprEYES discovers and allows configuration of the ExtendNet VPN. It
automatically discovers an ExtendNet VPN on the same local subnet but
requires multicast support to discover an unconfigured device that is on a
remote network.
3. Configure a remote client to access the ExtendNet VPN.
The Citrix ICA Client must already be installed on the remote client
machine in order to log on to the Citrix server.
4. Test the configuration by attempting to connect the remote client to the
ExtendNet VPN.
5. After authenticating to the local network successfully, the remote client can log
on to the Citrix server by a TCP ICA connection. This type of connection is
enabled by default on a MetaFrame 1.8 for Windows 2000 server.
Usage
When utilizing the ExtendNet VPN, a client performs the following steps to
initiate a Citrix MetaFrame session.
1. Connect to the Internet. This is typically achieved through a DUN connection
but can also be through a LAN connection to the Internet.
2. Double-click the DUN icon representing the VPN connection to the ExtendNet
VPN.
Note
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