TCP/IP in Windows 2000 Professional
To enable ICS, you must be logged on to an account that has
administrative rights.
To enable Internet Connection Sharing
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In Control Panel, open Network and Dial-Up
Connections.
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Right-click the connection you want to share (the
connection that connects to the Internet), and then click
Properties.
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On the Sharing tab, select the Enable Internet
Connection Sharing for this connection check box.
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If the shared connection is a dial-up connection and you want the
connection to dial automatically when another computer on your network
attempts to use external resources, select the Enable on-demand
dialing check box.
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Click OK.
A dialog box is displayed, indicating that the intranet's
connection's IP address is set to 192.168.0.1, and warns that
connectivity with other computers on the network might be lost.www.tartoos.com
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Click Yes.
Note
If your office users need
to gain access to a corporate network via a VPN server that is connected
to the Internet, they need to create a PPTP-based virtual private network
(VPN) connection to tunnel from the computer on the intranet to the
corporate VPN server on the Internet. The VPN connection is authenticated
and secure, and creating the tunneled connection allocates proper IP
addresses, DNS server addresses, and WINS server addresses for the
corporate network.
When ICS is enabled, the TCP/IP configuration is modified on the
computer with the shared connection, and services related to network
translation are started. Table 22.7 shows the modified system
configuration on the sharing computer:www.tartoos.com
TCP/IP in Windows 2000 Professional
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Table 22.7 ICS System Configuration Modifications
|
Modified Configuration
|
ICS Setting
|
|
IP address
|
Configured for the reserved private IP address
192.186.0.1, subnet 255.255.255.0.
|
|
IP routing
|
Created when the shared connection is
established.
|
|
DHCP allocator
|
Enabled with the default range of 192.168.0.0, subnet
255.255.255.0.
|
|
DNS proxy
|
Enabled through ICS
|
|
Internet Connection Sharing service
|
Started
|
|
Autodial feature
|
Enabled
|
Note
You cannot modify the default configuration of ICS. This
includes items such as disabling the DHCP allocator or modifying the range
of private IP addresses that are handed out. If you want to modify any of
these items, you must use Windows 2000 Server network address
translation. For more information about network address translation as
implemented in Windows 2000 Server, see “Unicast IP Routing” in the Internetworking Guide.
All computers on your network that access the Internet by means of
Internet Connection Sharing must reconfigure their TCP/IP configurations
to use DHCP. Each computer in the network is reassigned an IP address from
the reserved IP address range 192.168.0.2 to 192.168.0.254, with a subnet
mask of 255.255.255.0. As with the ICS-enabled computer, the change in IP
address might cause you to lose connectivity with other computers in the
network that use static addressing.
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