WARNING -- Version three of this router (the newest, currently shipping/on the shelf version with firmware 1.04.8) will not accept static or DHCP IP addresses that are Class A or Class B. It is arrogant and willfully lazy of Linksys to ship this router with this kind of problem. As of this writing (9-10-03) there is no firmware upgrade fix available. Only the original firmware version from 6-20-03 is available, and you CAN NOT use the firmware for the previous versions of this model with the version 3 model. I hope this saves you hours on tech support with temps being paid to lead you through a diagnostic tree with no actual knowledge of the device.