Hello isa, I try to follow the instructions from http://www.isaserver.org/pages/tutorials/adsl_setup.htm First: Ok, I noticed the physikal address of my wan-modem as 00-53-45-00-00-00 but within HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\[your_adapter's_MAC_address] I coudn't find any interface with the above ID. So, where's the adapter to give a new key-value (IPAutoconfigurationEnabled )?? wkr: Wilhelm Pieper