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Linksys E-Series
To determine the address range by using a Mac computer:
a. Connect your computer into your upstream network's router
b. From the Dock, click System preferences, click Network, then click
Ethernet in the window to the left A network status window appears
c. Take note of the IP address In this example, the IP address is
192 168 100 139
Example: The above examples show that upstream IP addresses are on
the 192 168 100 0 network (The "0" indicates the entire network ) Your
upstream network's address may be different The default address of
your new Linksys router is 192 168 1 1 In setting up one router behind
another, you must make sure that the local network on your new router is
different than the network of your upstream router In the above example,
because the default local network on your Linksys router 192 168 1 0 is
on a different subnet than the office network's 192 168 100 0, you will be
able to place your Linksys router behind the other router
2. Connect an Ethernet network cable to a LAN/Ethernet port on your
upstream network to the yellow Internet port on your router
CAUTION
Connect the upstream network to your router's yellow Internet
port, not one of the blue Ethernet ports If you connect to an
Ethernet port, you create IP addressing problems for the office
network
TIPS
An office network often has a wall plate with an Ethernet port that
you can connect to
If you are doing this in a home environment (without wall ports),
connect an Ethernet network cable between a LAN port on your
upstream router and the Internet port on your Linksys router
3. Run Cisco Connect on each computer that you want to connect to
the Linksys router Each computer needs either a wired or wireless
connection to the Linksys router For more information, see "How to
connect a computer to your network" on page 13
The computers that are connected to the Linksys router are now on the same
network, and are isolated from the upstream network However, you will still
have access to the Internet through the upstream router (by way of your Linksys
router) Because two routers are between your computer and the Internet,
Internet traffic undergoes two network address translations This is sometimes
referred to as Double NAT
Your computers can also use the built-in capabilities of your Linksys router,
such as parental controls If you need further control over the type of content
your employees or family access, you can create an account with an Internet
filtering site such as www.opendns.com or www.bsecure.com After you
create an account with them, use their DNS in place of your ISP's DNS
To use their DNS:
Setup > Basic Setup
1. Log into the browser-based utility (see "How to open the browser-based
utility" on page 21)
2. Click the Setup tab, then click the Basic Setup page
Setting Up: Advanced
33
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