This is useful information, but In the case of a typical (UK) ADSL router, there is no way to configure the router. It's entirely a black box. Contractually (with British Telecom), you are not allowed to replace the box which they supply. Is there any other way to make a DMZ? e.g. what about make ISA/RRAS do some NAT on selected IP addresses, create a 'DMZ' with a private address range (but excluded from the LAT) - e.g. 192.168.254.0/24 ? What are the security / operationa / other implications? Thanks Clive