The setup is following:

Internet (108.99.XXX.XX) <-> Windows Server 2003 (10.0.0.1) <-> Switch <-> Office Computers (10.0.0.100-200 some static routes some manual some automatic)

Windows Server has NAT installed on it and two network interfaces are configured properly.

The problem is, whenever I try to forward port 80 (or any other) from office computer (lets say 10.0.0.100), it fails.

Nic #1 Settings:

All settings are obtained from ISP

Nic #2 Settings:

Set manually

IP: 10.0.0.1

Mask: 255.255.255.0

Nat Server is configured to automatically assign IP addresses to private network. Settings are:

IP: 10.0.0.0

Mask: 255.255.255.0

Forwarding was done in Routing and Remote Access > (local) -> IP Routing -> NAT/Basic Firewall -> Local Area Connection (right click_>properties) -> services and ports -> Web Server HTTP -> Private Address: 10.0.0.100

SO what is causing the problem of failure to forward any port from other computer inside private network?