Linksys WRT 1900AC

WRT 900AC | Setting Up: Advanced 36
TO SHARE AN INTERNET CONNECTION
Note:
This is a complex process, so this procedure assumes that you have some
networking knowledge.
To add another router to share an Internet connection, do the following:
This topic covers cases one and two above
• DeterminetheIPaddressrangeforyourupstream(officeorbuilding)network.
• TodeterminetheaddressrangebyusingaWindowscomputer:
• Connectyourcomputertoyourupstreamnetwork’srouter.
• ClickStart, Run, type CMD, then click OK. The command prompt window appears.
• Type“ipconfig,”thenpressEnter.
Tip:
Although you can determine your computer’s IP address in many ways, this
method is quick and relatively easy.
• TakenoteoftheIPaddress.Inthisexample,theIPaddressis92.68.00.92.
• TodeterminetheaddressrangebyusingaMaccomputer:
• Connectyourcomputertoyourupstreamnetwork’srouter.
• FromtheDock,clickSystem preferences, click Network, then click Ethernet in
the window to the left. A network status window opens.
• TakenoteoftheIPaddress.Inthisexample,theIPaddressis92.68.00.39.
• Example:TheaboveexamplesshowthatupstreamIPaddressesareonthe
92.68.00.0 network. (The “0” indicates the entire network.) Your upstream
network’s address may be different. The default address of your new Linksys
router is 92.68... 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 92.68..0 is on a different subnet than the office network’s
92.68.00.0, you will be able to place your Linksys router behind the other router.
• 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 ad-
dressing 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.
Run your router’s setup CD 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 .
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 em-
ployees 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.