CA2260561A1 - An improved method for network address translation - Google Patents

An improved method for network address translation Download PDF

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Publication number
CA2260561A1
CA2260561A1 CA002260561A CA2260561A CA2260561A1 CA 2260561 A1 CA2260561 A1 CA 2260561A1 CA 002260561 A CA002260561 A CA 002260561A CA 2260561 A CA2260561 A CA 2260561A CA 2260561 A1 CA2260561 A1 CA 2260561A1
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CA
Canada
Prior art keywords
address
home network
router
internet
destination
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002260561A
Other languages
French (fr)
Other versions
CA2260561C (en
Inventor
Murali Aravamudan
Hong-Yi Tzeng
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia of America Corp
Original Assignee
Lucent Technologies Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lucent Technologies Inc filed Critical Lucent Technologies Inc
Publication of CA2260561A1 publication Critical patent/CA2260561A1/en
Application granted granted Critical
Publication of CA2260561C publication Critical patent/CA2260561C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/2514—Translation of Internet protocol [IP] addresses between local and global IP addresses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/2517—Translation of Internet protocol [IP] addresses using port numbers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/2546—Arrangements for avoiding unnecessary translation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2596—Translation of addresses of the same type other than IP, e.g. translation from MAC to MAC addresses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2101/00—Indexing scheme associated with group H04L61/00
    • H04L2101/60—Types of network addresses
    • H04L2101/618—Details of network addresses
    • H04L2101/622—Layer-2 addresses, e.g. medium access control [MAC] addresses

Abstract

A method for translating non Internet unique addresses of a home network device to an Internet unique address for internet communication through a router.
Every device within a given home network is assigned three addresses:(i) a configured address identical to the network address of the router enabling access to an Internet;
(ii) a logical address visible only to the other devices in the same home network; and (iii) a medium access control ("MAC") address. Every packet originating from a home network source device includes its MAC address, the router MAC address, its configured address and the network destination address, and is forwarded to its destination through the router. The router examines the network destination address to determine whether the communication is intranet or internet. For intranet communications the router replaces the configured address of the home network source device with the logical address of the home network source device, the logical address of the home network destination device with the configured address, its MAC
address with the MAC address of the home network destination device, and forwards the packet to the home network destination device. For Internet communications the router forwards the packet along the Internet without replacing any of the source or destination information in the headers of the packet. Based on the source MAC
address, however, the router records the logical address of the home network source device as well as the DA, SP, DP and PT in order to identify a response to the packet from the Internet destination device.
CA002260561A 1998-02-20 1999-01-26 An improved method for network address translation Expired - Fee Related CA2260561C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/027,708 1998-02-20
US09/027,708 US6006272A (en) 1998-02-23 1998-02-23 Method for network address translation

Publications (2)

Publication Number Publication Date
CA2260561A1 true CA2260561A1 (en) 1999-08-20
CA2260561C CA2260561C (en) 2002-11-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA002260561A Expired - Fee Related CA2260561C (en) 1998-02-20 1999-01-26 An improved method for network address translation

Country Status (2)

Country Link
US (1) US6006272A (en)
CA (1) CA2260561C (en)

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