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=Motivation & Background=
When I moved into my new home [https://en.wikipedia.org/wiki/AT%26T_U-verse AT&T UVerse] was my only real option for internet access. I called them up & had the service installed & activated. The installation consists consisted of a special, proprietary, AT&T [https://en.wikipedia.org/wiki/Very-high-bit-rate_digital_subscriber_line VDSL] modem, a DC Power Supply, & a special, AT&T 2Wire Router model i38HG.
To my initial dismay, I found that the VDSL modem could not function without the AT&T 2Wire Router. This was a problem for me as the 2Wire Router is limited in functionality and I was used to administering my home network using a [https://en.wikipedia.org/wiki/Linksys_WRT54G_series#WRT54G Linksys WRT54G] with [http://www.dd-wrt.com DD-WRT] firmware installed. I used this firmware load to allow me to assign [https://en.wikipedia.org/wiki/IP_address#Uses_of_static_addressing static IPs], [https://en.wikipedia.org/wiki/MAC_filtering MAC Address Filtering], and reasonably complex [https://en.wikipedia.org/wiki/Port_forwarding Port Forwarding].
I did a little bit of Googling & some experimenting and ended up with a solution I was happy with. Essentially I disabled the wireless radio on the 2Wire i38HG, plugged my Linksys WRT54G into the i38HG and had the i38HG pass all traffic through to the WRT54G. I have the local address of the i38HG as 192.168.0.1 and it can assign 192.168.0.2 through 192.168.0.5 on its wired ports. The WRT54G has a local address of 192.168.1.1 and assigns all wired & wireless ip IP addresses from the 192.168.1.XXX block.
The trick to getting everything to work is ensuring that the settings are correct on both the i38HG (or 5268AC) & WRT54G. Below is a explanation of the steps to go through to set your network up like mine. I'm assuming you've already got DD-WRT installed and working on your Router. If not, visit the [http://www.dd-wrt.com DD-WRT website] for help. The IP address of your AT&T 2Wire i38HG Router (or 5268AC Gateway) is printed on the side , or bottom, of the Routerunit. The default password for the i38HG is a long string of numbers printed on the side of the DC Power Supply / Battery Backup. (I recommend you change this password). The 5268AC uses a "Device Access Code" instead which is printed on the passwordbottom of the unit.
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=Linksys WRT54G DD-WRT Setup=#Using a wired connection, log into your Linksys WRT54GDD-WRT router
#Navigate to Setup -> Basic Setup -> WAN Setup -> WAN Connection Type -> Connection Type & select "Automatic Configuration - DHCP"
#Navigate to Setup -> Basic Setup -> Router IP and enter in the values below
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=AT&T 2Wire i38HG / 5268AC Setup=#Using a wired connection, log into your AT&T Router (the IP address is printed on the side , or bottom, of the Routerunit. The i38hG password is printed on the side of the DC Power Supply / Battery Backup. The Device Access code for the 5268AC is printed on the bottom of the unit)#Navigate to Settings -> LAN -> Wireless (or Wi-Fi) -> Wireless Access Point & select "Disabled"for both the 2.4GHz and 5GHz (if you have it) Wireless Networks. Then hit "Save"<br />[[File:Settings-LAN-Wireless.png]]
#Navigate to Settings -> LAN -> DHCP & select the "Configure manually" radio button and enter the values below. Then hit "Save"
##Router Address: "192.168.0.1" (this is the address of your AT&T 2Wire i38HG)