WO1997040610A3 - Internet protocol filter - Google Patents

Internet protocol filter Download PDF

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Publication number
WO1997040610A3
WO1997040610A3 PCT/CA1997/000269 CA9700269W WO9740610A3 WO 1997040610 A3 WO1997040610 A3 WO 1997040610A3 CA 9700269 W CA9700269 W CA 9700269W WO 9740610 A3 WO9740610 A3 WO 9740610A3
Authority
WO
WIPO (PCT)
Prior art keywords
filter
private
internet
address
public
Prior art date
Application number
PCT/CA1997/000269
Other languages
French (fr)
Other versions
WO1997040610A2 (en
Inventor
Bruce Anthony Wootton
William G Colvin
Original Assignee
Northern Telecom Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=21774476&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1997040610(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Northern Telecom Ltd filed Critical Northern Telecom Ltd
Priority to DE69708281T priority Critical patent/DE69708281T2/en
Priority to EP97917189A priority patent/EP0895684B1/en
Priority to JP9537534A priority patent/JPH11508753A/en
Priority to KR1019980708503A priority patent/KR100317443B1/en
Priority to AU25632/97A priority patent/AU707905B2/en
Priority to CA002248577A priority patent/CA2248577C/en
Publication of WO1997040610A2 publication Critical patent/WO1997040610A2/en
Publication of WO1997040610A3 publication Critical patent/WO1997040610A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
    • H04L63/0281—Proxies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4604—LAN interconnection over a backbone network, e.g. Internet, Frame Relay
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
    • 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
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
    • H04L63/029—Firewall traversal, e.g. tunnelling or, creating pinholes

Abstract

The IP filter (12), embodying the present invention, is a communications device designed to provide public network (14) or Internet (16) access to nodes (18) of private networks (10), advantageously without requiring the private nodes on such networks to register public Internet addresses. The IP filter presents a single IP address to the Internet and uses a plurality of IP ports to solve the problem of IP address conservation. It initiates sessions by assigning private side IP sessions to a unique port of the IP filter's public address. The IP filter effects a translation between a source port number for the private network and a destination port number for the public network for communication therebetween. Benefits of the IP filter include private node security and conservation of Internet-registered addresses.
PCT/CA1997/000269 1996-04-24 1997-04-23 Internet protocol filter WO1997040610A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE69708281T DE69708281T2 (en) 1996-04-24 1997-04-23 INTERNET PROTOCOL-FILTER
EP97917189A EP0895684B1 (en) 1996-04-24 1997-04-23 Internet protocol filter
JP9537534A JPH11508753A (en) 1996-04-24 1997-04-23 Internet Protocol Filter
KR1019980708503A KR100317443B1 (en) 1996-04-24 1997-04-23 Internet protocol filter
AU25632/97A AU707905B2 (en) 1996-04-24 1997-04-23 Internet protocol filter
CA002248577A CA2248577C (en) 1996-04-24 1997-04-23 Internet protocol filter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US1594596P 1996-04-24 1996-04-24
US60/015,945 1996-04-24

Publications (2)

Publication Number Publication Date
WO1997040610A2 WO1997040610A2 (en) 1997-10-30
WO1997040610A3 true WO1997040610A3 (en) 1997-11-27

Family

ID=21774476

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA1997/000269 WO1997040610A2 (en) 1996-04-24 1997-04-23 Internet protocol filter

Country Status (9)

Country Link
US (1) US6128298A (en)
EP (1) EP0895684B1 (en)
JP (1) JPH11508753A (en)
KR (1) KR100317443B1 (en)
CN (1) CN1216657A (en)
AU (1) AU707905B2 (en)
CA (1) CA2248577C (en)
DE (1) DE69708281T2 (en)
WO (1) WO1997040610A2 (en)

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