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Many smart or connected devices come with wired-only connections (Ethernet), like your TV, game console, DVD player, TiVo, or other streaming-media device. Unless your Internet modem or wireless router happens to be at the same location as those devices, connecting them to your wireless network can be a challenge.
Possible solutions include,
power-line adapters,
dedicated wireless adapters for each device, or installing Ethernet
jacks. Unfortunately, those options can get expensive and each has its
unique drawbacks. Another option is using a wireless bridge. A wireless
bridge connects two wired networks together over Wi-Fi. The wireless
bridge acts as a client, logging in to the primary router and getting an
Internet connection, which it passes on to the devices connected to its
LAN Jacks. You can buy a dedicated wireless bridge, but if you have an
old router lying around, you might be able to convert it into a wireless
bridge using DD-WRT.
DD-WRT is free
Linux-based firmware for routers that replaces the router's factory
firmware. It can breathe new life into an old router, giving it enhanced
performance and new features. One of the features of DD-WRT is the
ability to switch the router's function to a wireless bridge.
This tutorial, based on the
DD-WRT Wiki,
will go over how to configure DD-WRT for use as a wireless bridge
(client bridge mode), using a Linksys WRT54G router as an example. The
process is fairly straightforward but will require some time and
patience to complete. In the steps below,
primary router refers to the main router that you'll connect to, while
bridge router refers to the router you're configuring as a client bridge.
Step 2: If your router is supported, you'll see it listed in
the database and it'll include links to the firmware. It may also
include device-specific directions on how to install DD-WRT, but you'll
want to read over the
general installation notes
as well. In some cases, you'll need to install a firmware prep, prior
to installing the actual DD-WRT firmware. It's possible to brick your
router during installation if not performed correctly, so read the
directions carefully and follow each step as noted.
Step 3: Once you've successfully installed DD-WRT, perform a
hard reset on the router. This usually involves holding a reset
button/pin for 30 seconds or until you see the router's lights flashing.
Refer to your router's user manual to figure out the exact method for a
hard reset.
Step 4: Connect an Ethernet cable from your computer to one of
the LAN jacks on the bridge router, then set a static IP address on
your computer. Use something like 192.168.1.10, so you'll be on the same
subnet as the bridge router, which will have an IP address of
192.168.1.1.
Step 5: Open a Web browser and enter 192.168.1.1 in the
address bar. The DD-WRT Web interface will appear and you'll be prompted
to change your username and password. Choose a username and password,
then click the Change Password button.
Step 6: Go to Wireless > Wireless Security, then set the same Security Mode, Algorithm, and Shared Key as your primary router. Click Save.
Step 7: Go to Wireless > Basic Settings, then change the Wireless Mode to Client Bridge. Set the same Network Mode and SSID
as your primary router. If your bridge router is an N router, you may
also need to set the same wireless channel width as your primary router.
Click Save, then Apply Settings.
Step 8: Go to Setup > Basic Setup, then fill in the router IP info. For the local IP address
of the router, choose an address in the same subnet as your primary
router. If your primary router is on the 192.168.1.x subnet, choose
something like 192.168.1.15. Leave the Subnet Mask as 255.255.255.0 and enter the IP address of your primary router as the Gateway. Leave Local DNS blank and select your time zone. Optionally, you can check the box to Assign WAN Port to Switch. This converts the WAN port to a LAN port, providing you with an extra port on your bridge router. Click Apply Settings
Step 9: Log back in to your bridge router using the new address you set (192.168.1.15).
Step 10: Go to Security > Firewall, then under Block WAN Requests, make sure that only "Filter Multicast" is checked. Click Save.
Step 11: Under Firewall Protection, make sure "SPI Firewall" is disabled, then click Apply Settings.
Step 12: Go to Setup > Advanced Routing, then set the
Operating Mode to "Router." Click Save.
Step 13: Remove the static IP address from your computer and
re-enable automatic IP addressing. At this point, the bridge router
should pass along an IP address from the primary router to your
computer, giving you access to the Internet.
Step 14: Once you've verified that your computer can access
the Internet while physically connected to the bridge router, you can
disconnect your computer. You're now ready to connect your wired devices
to the bridge router from anywhere in your home (within range of your
primary router).
Notes:
- If you're using MAC filtering on your primary router, you'll want to
add the bridge router's wireless MAC address, not the LAN MAC address
that's usually printed physically on the router. To find the wireless
MAC address, go to Status > Sys-Info.
- If your primary router is a Wireless-N router, but your bridge
router is a Wireless-G router, you may need to set the wireless mode to a
setting that supports b/g networks.
That's it. Now you can connect all your wired devices to your
wireless network, even if they're not next to your primary router. It's
worth mentioning that a wireless bridge is also useful when the scenario
is reversed. If you have your Internet modem and primary router next to
your TV, but need connectivity to your computer in another location,
you can use the wireless bridge to provide a connection to your
computer, printer, NAS, etc.