Systems and methods for network address translation

• US 8,370,524 B2
• Filed: 07/16/2012
• Issued: 02/05/2013
• Est. Priority Date: 10/15/2002
• Status: Expired due to Term

• Current Assignee: Nomadix, Inc. (Nippon Telegraph and Telephone Corporation)
• Original Assignee: Nomadix, Inc. (Nippon Telegraph and Telephone Corporation)
• Inventors: Paunikar, Amit, Singh, Bikramjit
• Primary Examiner(s): JACOBS, LASHONDA T
• Application Number:
  US13/550,079
• Publication Number:
  US 20120284364A1
• Time in Patent Office: 204 Days
• Field of Search: 709/245, 709/238, 709/227, 709/229, 370/401, 370/392, 370/352
• US Class Current: 709/245
• CPC Class Codes: H04L 45/745 Address table lookup; Address filtering
• CPC Class Codes: H04L 61/106 across networks, e.g. mapping telephone numbers to data network addresses
• CPC Class Codes: H04L 61/25 of the same type
• CPC Class Codes: H04L 61/2514 between local and global IP addresses
• CPC Class Codes: H04L 61/2557 Translation policies or rules
• CPC Class Codes: H04L 61/5007 Internet protocol [IP] addresses
• CPC Class Codes: H04L 61/5046 Resolving address allocation conflicts; Testing of addresses testing when self-assigning an address H04L61/5092

Abstract

An intelligent network address translation system and methods for intelligent network address translation. In one embodiment, a network packet is received from a host device, and a stored record associated with the host device is identified. The stored record includes information relating to connection parameters associated with the host device. Using the stored record, a processor determines whether the network packet should be assigned a dedicated address. If so, then the network packet is transmitted using communication parameters including a dedicated IP address. If the packet should not be assigned a dedicated address, then the packet is transmitted using connection parameters including a default public IP address and a port number.

Claims

1. A method of processing network packets comprising:

processing a network packet received at a network port;

determining whether the network packet should be assigned a first IP address type or a second IP address type, the determination being based at least in part on data relating to a host device associated with the network packet; and

transmitting the network packet to an external network system, using communication parameters including either a an IP address of the first IP address type if the network packet should be assigned a first IP address type based on the determination, or an IP address of the second IP address type if the network packet should be assigned a second IP address type based on the determination.

2. The method of claim 1, wherein the data relating to the host device associated with the network packet comprises data stored in a connection lookup table, the data indicating communication parameters associated with an address in the network packet, the address being indicative of the host device.

3. The method of claim 2, wherein the connection lookup table further comprises information indicating which host computers require the first IP address type.

4. The method of claim 2, wherein the operations further comprise:

receiving an incoming data packet from the external network system;

locating stored connection parameters in the connection lookup table corresponding to the incoming data packet; and

transmitting the incoming data packet, using the stored connection parameters.

5. The method of claim 1, wherein transmitting the network packet from the computer system comprises transmitting an outgoing packet based on the network packet, the outgoing packet comprising a header address information different from the address information of the network packet.

6. The method of claim 1, in combination with a computer system comprising one or more processors and one or more network ports.

7. A network address translation system comprising:

a processor;

a computer readable storage device in communication with the processor;

one or more network interfaces in communication with the processor, at least one of the network interfaces being associated on the network address translation system with a first IP address; and

an address selector module configured to perform, on the processor, operations comprising;

receiving first data from a local network via one of the network interfaces;

identifying a host computer associated with the first data;

identifying a record stored in the computer readable storage device, the stored record indicating whether to use the first IP address with the host computer; and

constructing second data based on the first data, wherein the second data includes either the first IP address and a selected port, or a second IP address, depending on whether the stored record indicates to use the first IP address with the host computer.

8. The network address translation system of claim 7, wherein the information included in the first data identifies the host device.

9. The network address translation system of claim 7, wherein the stored record further indicates that the second IP address is assigned to the host device.

10. The network address translation system of claim 7, further comprising an outgoing connection lookup module configured to communicate with a connection lookup table to identify the stored record, wherein the stored record further comprises connection parameters associated with the host device.

11. The network address translation system of claim 9, further comprising a connection creation routine configured to store the stored record in the connection lookup table.

12. The network address translation system of claim 9, further comprising:

an incoming connection lookup module configured to communicate with the connection lookup table to determine connection parameters for incoming data packets based on the source address of the incoming data packets; and

a reverse translator module configured to perform reverse network address translation on the incoming data packets based on the stored record in the connection lookup table.

13. The network address translation system of claim 7, further comprising a packet type detection module configured to receive third data from a host, determine whether the third data is associated with a protocol requiring a globally unique IP address, and allocate a dedicated IP address to the host if the third data is associated with a protocol requiring a globally unique IP address.

14. The network address translation system of claim 7, wherein the first data comprises one or more network packets.