I have now tested from a simple pc on the network between isa server and adsl with the exact same result... telnet Isa ext IP, screen goes blank then says connection lost. Those log entries I e-maled to you appear to be the attempts. NB. Interesting thing. The E2k server now has 2nd nic in the 172.x network (isa ext network) and ADSL router has 110 directed to the E2k server. ISa appears to be logging the traffic from the ADSL to E2k server??? Does Isa packet sniff or log all traffic that passes on its network??