Windows XP Internet Connection Sharing
setup is very straightforward. It is also quite similar to
Windows 2000 Internet Connection Sharing. To configure ICS,
you need to configure both an ICS host and the clients on
the network.
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11.
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The Wizard configures the selected network
settings. If the Wizard is running on a Windows
XP computer, the screen as shown in
Figure 8.13
appears. Select Just
finish the wizard and click
Next.
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12.
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When configuration is complete, the Wizard's
Completion
screen appears, shown in
Figure 8.14.
Click Finish
to exit.
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To support applications or services, such
as a Web site that sits behind an ICS host, you need to
create a static port mapping for the ICS host. This permits
users outside the internal network to initiate a session
with the host providing the service or application. To
create this mapping, perform the following steps.
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1.
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Click Start,
then Settings,
then Network
Connections. Right-click the connection
that is configured as the ICS host. Select
Properties
from the context menu.
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2.
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Select the Advanced
tab on the ICS connection properties sheet, and
then click the
Settings button, shown in
Figure 8.15.
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3.
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The Advanced
Settings property sheet appears. Put a
check mark in the box of each service for which
you want to enable external access, as shown in Figure 8.16.
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4.
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Once the check mark has been placed in the box
for a service, the
Service Settings dialog box with the
default port mappings for that service is
displayed, as shown in Figure 8.17.
Enter the name or IP address of the host
providing the service. Click OK to accept.
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5.
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If the ports for that service do not match what
you desire, or if the service you want to
configure does not appear in the list, click the
Add button. A
blank Service
Settings dialog box appears, as shown in Figure 8.18.
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6.
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Provide the following information for the
service you are configuring:
- Description
of the service: The name of the
service you provide. This can be a friendly
name.
- Name or IP
address of the computer hosting this service
on your network.
- External
port number for the service: Enter
the port that remote hosts use to connect to
this application or service. Also specify if
the ports are TCP or UDP.
- Internal
port number for the service: Enter
the TCP or UDP ports on the service running
on the internal host.
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7.
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Click OK, and
then close the ICS properties sheet.
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If you are looking for a
simple-to-implement, cost-effective Internet connection
sharing service for your small home or office network,
Windows XP ICS fits the bill nicely. Configuring ICS beyond
these basic options, however, is not possible. Although this
makes enabling or disabling its use or setting up
applications and services to run through the ICS host a
piece of cake, it may make ICS not the best choice for NAT-ing
your network. Name resolution and address assignment methods
used by ICS may conflict with services currently offered on
your network. Keep these things in mind when you are
thinking about implement-ing ICS:
