i have a question about nat ,i have setup the adsl modem etc ,i telnet too the modem and entered nat defserver addr X.X.X.X into the modem everything was working fine ,then when i went to check the connection to the server using a dial-up connection a few hours later i couldnt log on to the server ???? i telnet to the modem again and there was no defserver listed ? i re entered the command as above and all is well again .can someone please explain why i had to re-enter it again .thanks spock