Hi Brian.Mark,

Our current setup does have the same subnet mask on each side. I didn't realise this would be an issue.

INTERNET SIDE [192.168.0.1 - 255.255.255.0]
LAN SIDE [192.168.16.100 - 255.255.255.0]

Do you mean that my router should have the IP address assigned by our ISP on it? If so, I was wondering if you could give me an example changing my setup from what it currently is below:

Static IP assigned by ISP:
IP: 81.174.143.54

Cisco DSL Router:
IP: 192.168.0.2
Subnet Mask: 255.255.255.0

Server INTERNET Side NIC:
IP: 192.168.0.1
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.0.2

Server LAN Side NIC:
IP: 192.168.16.100
Subnet Mask: 255.255.255.0

Thanks again for your help...

__________________
Chris