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12 January 2008

Build a Wireless Repeater Bridge

Posted by Jaisal Abdurrahman

To build a network bridge is easy through a Ethernet cable.It is used to connect two LAN segment. Making it trough a wireless link is not easier like Ethernet. The two segments will be in the same subnet and look like two Ethernet switches connected by a cable to all computers on the subnet.wireless bridge will be great idea when we don't want to run an Ethernet cable between two locations.
The following guide is explains building of a wireless repeater bridge using DD-WRT firmware from my experience
the example scenario as follows :-
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Materials used :-

Linksys WRT54G as primary router
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Linksys WAP54G v3 as secondary access point
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DD-WRT v24 Beta (08/15/07) micro Firmware to flash WAP54g

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Flash your WAP54G with DD-WRT v24 Beta (08/15/07) micro firmware

  1. On Secondary(DD-WRT) Router make Restore Factory Defaults
  2. Connect your PC to the secondary router via wired or wireless
  3. Open the Wireless -> Basic Settings tab
    • Wireless Mode : Repeater Bridge
    • Wireless Network Mode : Mixed
    • Wireless Network Name(SSID) : Same as Primary Router
    • Wireless Channel : Auto
    • Wireless SSID Broadcast : Enable
    • Network Configuration : Bridged
    • Save Settings
  4. Virtual Interfaces Section
    • Add
    • Wireless Network Name(SSID) : anything Different from Primary Router
    • Wireless SSID Broadcast : Enable
    • AP Isolation : Disable
    • Network Configuration : Bridged
    • Save Settings
  5. Open the Setup -> Basic Setup tab
    • Connection Type : Disabled
    • IP Address : 192.168.1.2 (Assuming Primary Router IP is 192.168.1.1)
    • Mask : 255.255.255.0
    • Gateway: 192.168.1.1 (IP of your Primary Router)
    • Assign WAN Port to Switch : Checked or Unchecked - your choice
    • Save Settings
  6. Open the Security -> Firewall tab
    • Disable SP1 firewall
    • Save Settings
  7. Open the Status -> Wireless tab
    • Site Survey
    • Join Primary Router
    • Continue
  8. APPLY Settings
Now you can be able to connect internet through the newly configured Secondary router. Clients will receive IP Addresses from the Primary Router.(if DHCP Server Enabled)

2 comments:

Anonymous said...

Very good! This finally got me there! Thanks. However, this assumes there is no wireless security between primary and secondary routers and no wireless security for clients of the secondary router.

To address this, after the step 4 and before the step 5 shown in the tutorial, I have a new step:

4.5 Wireless -> Wireless Security

* For the physical interface (the one that names your primary router), choose the Security mode you want. By default this is DISABLED meaning no security/open system. I chose WPA because that is what my primary router expects from its clients. Then I entered the required additional information: WPA Algorithm and WPA Shared Key. Again, these are the values required by any client to connect to the primary router.

* For the virtual interface (the one to which clients of the secondary router connect), choose the Security mode you want. By default this is DISABLED meaning no security/open system. I wanted WPA for clients connecting to the secondary router as well. Then I entered the required additional information: WPA Algorithm and WPA Shared Key.

* Save Settings

Thanks again. David (Seattle, WA USA)

Jaisal Abdurrahman said...

@David
Thanks for your comment.you are right i missed the security part.thanks again for the explanation .

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