A firewall is a dedicated appliance, or software running on another computer, which inspects network traffic passing through it, and denies or permits passage based on a set of rules. [edit]
I have a couple of public IP addresses and I need to forward a port for an application that will be made available to handful of internal users.
I have SSH access to the proxy server which has the public IP address and is connected to our LAN.
How would I forward the port through this box? How can I confirm what firewall is already set up on that box?