There are 2 links to check out, and I've copied the content from the second one here - Its a run down of the instructions of how to set up Wireless Client Mode - once you have got the relevant firmware onto the route.
I used the firmware for version D3 on my router, which is officially version D4.
Once you have the DD-WRT firmware installed - which is dead easy - teh next bit is easy, assuming you take it one step at a time.
With Those thoughts in mind, here is how to configure it:
- Download the current recommended build for your router. Check the forum for your chipset to find recommended builds and general information related to your hardware. If you are using a Broadcom based router, read the peacock thread prior to starting. DO NOT USE SP1!
- Do a HARD reset on your router.
- Connect a cable from your computer to the LAN port on your router.
- Set your computer to a static IP address (e.g. 192.168.1.7)
- Open a web browser and connect to 192.168.1.1 to view the DD-WRT GUI.
- You should be asked to change your password and username. Carefully type these in. If you aren't asked for a password and username, do a hard reset, this time doing it properly! Hit change password.
- FIRST go to Wireless -> Wireless Security and enter the Security Mode and other key information that matches your primary router that you will be connecting to over wireless.
- Hit SAVE (not apply)
- NEXT go to the Wireless -> Basic Settings and change the Wireless Mode to Client.
- On that same tab set the Wireless Network Name (SSID) to exactly the same SSID as your primary router you will be connecting to over wireless. Make sure spelling and capitalization match. Note: If there are multiple routers broadcasting the same SSID, and you would like to connect to a specific one (IE, the primary router, instead of the repeater), enable MAC Filtering on the Wireless Tab, and add the MAC Address of the correct Access Point. The MAC Address can be found on the "Site Survey" page, linked from the "Wireless" Sub-tab of the "Status" Tab. - Conjur
- (Optional) Set the correct ack timing in meters. (Where?)
- Hit SAVE (not apply)
- NEXT go to Setup -> Basic Setup and change Connection Type to Automatic Configuration - DHCP (most likely, but see NOTE below).
- On that same tab in the Network Setup section set the Local IP Address to 192.168.2.1 (Your Client subnetMUST differ from the Primary Router subnet!).
- (Optional) Set Static DNS servers in the Network Address Server Settings section if your WAN type does not provide them or you want to use different ones than the AP provides.
- (Recommended) Change your Time Zone and DST to match where you are.
- (Optional) Set a Server IP/Name for in Time Setting section for NTP (it will use a hidden default server if you leave it blank).
- Hit SAVE (not apply)
- (Optional) Go to Security -> Firewall and disable the SPI Firewall if you do not need to worry about security between the AP and Client router.
- Hit Apply.
- Set your computer back to auto IP and auto DNS if you like. You will get a DHCP address from the router.
You are done and the Client router should connect to the AP within a minute or so. You may need to unplug the router for 17 seconds if the router doesn't reset. After you ensure that it does connect and work properly then you may configure any other settings you wish to (Virtual Interface for wireless connection for example).
Links:
