Patent ID: 7392379

Claim:
A firewall system for interconnecting a first Internet Protocol (IP) network employing a first firewall function to a second IP network employing a second firewall function, comprising: a console port for receiving one or more filtering rules for updating said first firewall function or said second firewall function; control means in communication with said console port; a firewall device in communication with the console port, said firewall device comprising a filtering means for performing both the first firewall function and the second firewall function, and for transmitting said one or more filtering rules, wherein the filtering means comprises a first filtering unit for performing the first filtering function and a second filtering unit for performing the second firewall function; and a second network address translation unit interconnected between the second IP network and the second filtering unit for changing a destination IP address of a packet transmitted to the second IP network and for changing a source IP address of a packet received from the second IP network.