Port Forwarding Problem with DPC3941
We are using the Comcast (Cisco) DPC3941B router/gateway on a small office network. We need to forward Port 443 to the server. The IP value of the Comcast gateway is 192.168.16.1. The fixed IP value for the server is 192.168.16.2. Whenever I try to create a port forwarding rule on Port 80 or Port 443 to the server I receive the following error message: "Failure! Please check your inputs."
The Comcast box functions as the DHCP server for the workstations on the network. The value range we have specified for DHCP IP assignments is between 100 and 199 (192.168.16.100 to 192.168.16.199).
I am not sure what is wrong here (having done port forwarding numerous times on other devices). Is it that the fixed IP of the server (the "receiving" machine of the port forwarding) is outside of the DHCP assigned IP addresses (192.168.16.2 vs. 192.168.16.x where "x" is great than or equal to "100")? Or is the problem due to the IP version we are employing (v4 and not v6, although there is a section of fields for v6 address information on the gateway port forwarding screen that is partially greyed out).
Our entire remote access system depends on this port forwarding function, which employs a static IP from Comcast. Most of our staff is working at home and can only work via remote access (which itself is not working due to the port forwarding problem).
Any assistance your can offer will be greatly appreciated.