Ultra-Low Power Single-Chip Firewall Security Device, System and Method

• US 20130061283A1
• Filed: 12/21/2011
• Published: 03/07/2013
• Est. Priority Date: 11/02/2010
• Status: Active Grant

• Current Assignee: Iota Computing, Inc.
• Original Assignee: Iota Computing, Inc.
• Inventors: Cullimore, Ian Henry Stuart, Walker, Jeremy
• Granted Patent: US 9,705,848 B2
• Time in Patent Office: Days
• US Class Current: 726/1
• CPC Class Codes: G06F 1/3237 by disabling clock generation or distribution
• CPC Class Codes: H04L 63/0209 Architectural arrangements, e.g. perimeter networks or demilitarized zones
• CPC Class Codes: H04L 63/0227 Filtering policies mail message filtering H04L51/212

Abstract

A firewall security device, system and corresponding method are provided that includes an operating system of an entirely new architecture. The operating system is based fundamentally around a protocol stack (e.g., TCP/IP stack), rather than including a transport/network layer in a conventional core operating system. The firewall security device may include a processor and an operating system (OS) embedded in the processor. The OS may include a kernel. The operating system kernel is a state machine and may include a protocol stack for communicating with one or more devices via a network interface. The OS may be configured to receive and transmit data packets and block unauthorized data packets within one or more layers of the protocol stack based on predetermined firewall policies.

Claims

1. A firewall security device, comprising:

a processor; and

an operating system (OS) embedded in the processor, the OS comprising an operating system kernel, the operating system kernel being a state machine and comprising a protocol stack for communicating with one or more devices via a network interface, wherein the OS is configured to receive and transmit data packets, and block unauthorized data packets within one or more layers of the protocol stack based on predetermined firewall policies.

2. The device of claim 1, wherein the network interface comprises at least one Network Interface Controller (NIC) coupled to the processor.

3. The device of claim 1, further comprising a Universal Asynchronous Receiver/Transmitter (UART) coupled to the processor.

4. The device of claim 1, further comprising a memory coupled to the processor, the memory comprising one or more of read only memory (ROM) and random access memory (RAM).

5. The device of claim 4, wherein the ROM stores instructions executable by the processor, the instructions comprising predetermined firewall policies for transmitting or blocking data packets.

6. The device of claim 1, wherein the protocol stack comprises a Transmission Control Protocol/Internet Protocol (TCP/IP) stack.

7. The device of claim 1, wherein the protocol stack comprises a User Datagram Protocol/Internet Protocol (UDP/IP) stack.

8. The device of claim 1, further comprising an asynchronous clock to serve as an internal clock for the operating system kernel, the asynchronous clock being configured to automatically stop when clock cycles are not needed.

9. The device of claim 1, wherein a time reference for the operating system kernel is received via a Network Time Protocol (NTP) or Simple Network Time Protocol (SNTP) from a remote time server coupled to the network.

10. The device of claim 1, wherein the network comprises the Internet and the operating system utilizes sockets style Application Programming Interface (API) of sockets and ports on IP addresses for implementing the predetermined firewall policies.

11. The device of claim 1, wherein the predetermined firewall policies comprise one or more of policies based on an Internet Protocol (IP) address, a protocol, an application, a user identity, and a network activity.

12. A method, comprising:

receiving a data packet, within an operating system (OS), the OS being a state machine that comprises a protocol stack for processing the data packet according to a network protocol, the operating system being embedded and executing within a processor; and

processing the received data packet within one or more layers of the protocol stack to determine whether the data packet is authorized based on predetermined firewall policies, wherein unauthorized data packets are blocked while authorized data packets are transmitted.

13. The method of claim 12, wherein the protocol stack comprises a Transmission Control Protocol/Internet Protocol (TCP/IP) or a User Datagram Protocol/Internet Protocol (UDP/IP) stack.

14. The method of claim 12, wherein data packets are transmitted via a network interface, the network interface comprising at least one Network Interface Controller (NIC).

15. The method of claim 12, wherein executable instructions for the operating system are stored in a read only memory (ROM) of the processor and executed through a sockets applications programming interface (API).

16. The method of claim 12, wherein the predetermined firewall policies comprise one or more of the policies based on an IP address, a protocol, an application, a user identity, a network activity.

17. A non-transitory computer-readable storage medium having embodied instructions thereon, the instructions executable by a processor to:

receive a data packet, within an operating system (OS), the OS being a state machine that comprises a protocol stack for processing the data packet according to a network protocol, the operating system being embedded and executing within a processor; and

process the received data packet within one or more layers of the protocol stack to determine whether the data packet is authorized based on predetermined firewall policies, wherein unauthorized data packets are blocked while authorized data packets are transmitted.

18. A system for routing data packets across communication networks, comprising:

a plurality of communication ports;

a switch, the switch being configured to transmit multiple data packets between the plurality of communication ports; and

at least one firewall security device, the firewall security device comprising a processor and an operating system (OS) embedded in the processor, wherein the OS comprises an operating system kernel, the operating system kernel being a state machine having a protocol stack for communicating with one or more devices via a network interface, wherein the OS is configured to receive and transmit data packets and block unauthorized data packets within one or more layers of the protocol stack based on predetermined firewall policies.

19. The system of claim 18, wherein the at least one firewall security device is coupled to at least one communication port and a switch.

20. The system of claim 19, wherein the at least one firewall security device comprises a plurality of firewall security devices, each of the plurality of communication ports being provided with a respective one of the plurality of firewall security devices.

21. The system of claim 19, wherein the protocol stack comprises a Transmission Control Protocol/Internet Protocol (TCP/IP) stack or a User Datagram Protocol/Internet Protocol (UDP/IP) stack.