Microsoft MN-150 User Manual

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Microsoft Broadband Networking 5-Port Switch User’s Guide
Option C:
My broadband modem has a firewall, and I want to use
the switch to add more computers to my network.
In this configuration, your 5-port switch is attached by Ethernet
cables to your broadband modem and to the computer that hosts
the modem. The switch then serves as a central connection point
for up to three additional computers. This option requires one
Ethernet cable to connect the switch to your computer and an
additional Ethernet cable for each additional computer.
If your Internet service provider (ISP) uses Dynamic IP (also called
DHCP) addressing, your modem must be able to provide IP
addresses for all computers to be connected to your network.
For more information, see your modem documentation.
After you set up the switch by using Option C, your network will
resemble this diagram:
Security Considerations for Option C
Because a switch provides no security features, it cannot make
your network secure. Your other networking hardware and software
must provide the necessary security. When you plan your network
under this setup option, you should make sure that your modem
contains a hardware firewall or uses Network Address Translation
(NAT) technology to hide your computers from unauthorized access
over the Internet. In this configuration, a broadband modem with
NAT enabled would provide partial protection. Software on each
computer, such as the Internet Connection Firewall for Windows XP,
can also provide security. Many routers or gateways, such as the
Microsoft Broadband Networking Base Station, provide firewall
protection and could be used between the switch and the
broadband modem to provide a higher level of security.
Active Internet Connection
Broadband Modem
with Firewall or NAT
(DSL or Cable)
5-Port Switch
Computers with
Installed Ethernet
Adapters