From DD-WRT Wiki
NOTE: During configuration or flashing a device, the only cables that should be hooked to the device are the power cable and the cable connecting the device to your computer
 Basic tutorials
These tutorials have content most new users will understand and be able to deploy.
 Advanced tutorials
These tutorials require a certain degree of knowledge about general networking that some new users may or may not understand.
 Installable packages
This list covers additional software that can be installed on devices running DD-WRT. Note that you can install any OpenWRT package, using ipkg. In October 2013 there were more than 3700 packages available. Additionally more than 1250 packages are provided with NSLU2-Linux Optware packages build specially for DD-WRT.