Source: http://www.google.com/patents/US5898784?dq=5,867,764
Timestamp: 2016-05-03 15:48:35
Document Index: 712672535

Matched Legal Cases: ['application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08']

Patent US5898784 - Transferring encrypted packets over a public network - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsThe invention features receiving encrypted network packets sent over a network at a network interface computer, and passing the encrypted network packets to a computer on an internal network. The invention also features receiving encrypted network packets at a first computer over a network from a second...http://www.google.com/patents/US5898784?utm_source=gb-gplus-sharePatent US5898784 - Transferring encrypted packets over a public networkAdvanced Patent SearchPublication numberUS5898784 APublication typeGrantApplication numberUS 08/963,512Publication dateApr 27, 1999Filing dateNov 3, 1997Priority dateJan 16, 1996Fee statusPaidAlso published asWO1997026734A1Publication number08963512, 963512, US 5898784 A, US 5898784A, US-A-5898784, US5898784 A, US5898784AInventorsAlan J. Kirby, Jeffrey A. Kraemer, Ashok P. NadkarniOriginal AssigneeRaptor Systems, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (9), Non-Patent Citations (29), Referenced by (125), Classifications (13), Legal Events (6) External Links: USPTO, USPTO Assignment, EspacenetTransferring encrypted packets over a public network
Referring to FIG. 1, while executing a variety of software applications, 10, 12, 14, for example, Telnet 10 or Microsoft™, Inc. Word™ 12, computers 16 and 18 may exchange data over networks 20, 21, for example, a telephone company network, a private network, or a public network such as the internet or X.25. The applications communicate using network protocols 22, 24, 26, for example, transmission control protocol/internet protocol (TCP/IP) 22 or internet packet exchange (IPX) 24, through application programming interfaces 28, 30, 32. Through application programming interfaces 34, 36, 38, the network protocols communicate with network drivers 40, 42, 44 to direct network interface hardware 46, 48 to transfer data over the networks.
The security network driver issues (step 74) an encapsulate call to an encapsulate/decapsulate library 76 through an API 77. In one example, the encapsulate/decapsulate library uses the swIPe IP Security Protocol created by J. Ioannidis of Columbia University and M. Blaze of AT&T™, Inc. which is described in an Internet Draft dated Dec. 3, 1993 and incorporated by reference. Referring also to FIG. 6, the encapsulate call generates a new network packet 78 in accordance with the swIPe protocol. The new packet includes a header 80, a swIPe protocol header 82, and data 84. According to options within the swIPe protocol, header 80 may be the original header 64 (FIG. 5), in which case, data 84 is the original data 66, or header 80 may be a new header including the address of a source firewall computer, e.g., computer 16 (FIG. 2), and a destination computer which may also be a firewall computer, e.g., 18. Where header 80 is a new header, data 84 includes the entire original network packet 62 (FIG. 5).
Library 90 may be of the type sold by RSA Data Security™, Inc. of Redwood City, California and may encrypt the data according to an RSA algorithm such as RC2 or RC4 or according to a federal information processing standard (FIPS) such as data encryption standard (DES).
Multiple tunnels 140, 142 may connect two computers 146, 148 and each tunnel may use a different encryption algorithm. For example, tunnel 140 may use the RC2 encryption algorithm from RSA Data Security™, Inc. while tunnel 142 uses the FIPS DES encryption algorithm. Because the RC2 encryption algorithm is less secure and requires less computer processing time than the FIPS DES standard, users may send a larger number of network packets requiring less security over tunnel 140 as opposed to tunnel 142. Similarly, predetermined groups of users or computers may be restricted to sending their packets over particular tunnels (effectively attaching a packet filter to each tunnel).
Although the security network driver was described with respect to send and receive functions, APIs from different manufacturers, for example, Sun™, Inc. and Microsoft™, Inc., include a variety functions, and the security network driver is designed to respond to each possible function.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS5099517 *Jun 29, 1990Mar 24, 1992Digital Equipment CorporationFrame status encoding for communication networksUS5161193 *Jun 29, 1990Nov 3, 1992Digital Equipment CorporationPipelined cryptography processor and method for its use in communication networksUS5235644 *Jun 29, 1990Aug 10, 1993Digital Equipment CorporationProbabilistic cryptographic processing methodUS5325362 *Sep 29, 1993Jun 28, 1994Sun Microsystems, Inc.Scalable and efficient intra-domain tunneling mobile-IP schemeUS5416842 *Jun 10, 1994May 16, 1995Sun Microsystems, Inc.Method and apparatus for key-management scheme for use with internet protocols at site firewallsUS5442708 *Sep 13, 1994Aug 15, 1995Uunet Technologies, Inc.Computer network encryption/decryption deviceUS5444782 *Jan 19, 1994Aug 22, 1995Uunet Technologies, Inc.Computer network encryption/decryption deviceUS5548646 *Sep 15, 1994Aug 20, 1996Sun Microsystems, Inc.System for signatureless transmission and reception of data packets between computer networksUS5550984 *Dec 7, 1994Aug 27, 1996Matsushita Electric Corporation Of AmericaSecurity system for preventing unauthorized communications between networks by translating communications received in ip protocol to non-ip protocol to remove address and routing services information* Cited by examinerNon-Patent CitationsReference1"Digital Internet Tunnel V1.0", pp. 1-3, Digital Equipment Corp.2"Internet Portal, Version 1.1", pp. 1-16, Digital Equipment Corp.3"Internet Security: Screening External Access Link (SEAL)", pp. 1-2, Digital Equipment Corp.4 *Digital Internet Tunnel V1.0 , pp. 1 3, Digital Equipment Corp.5 *Internet Portal, Version 1.1 , pp. 1 16, Digital Equipment Corp.6 *Internet Security Association and Key Management Protocol (ISAKMP), Douglas Maughan and Mark Schertler, National Security Agency, pp. 1 117, Nov. 1995.7Internet Security Association and Key Management Protocol (ISAKMP), Douglas Maughan and Mark Schertler, National Security Agency, pp. 1-117, Nov. 1995.8 *Internet Security: Screening External Access Link (SEAL) , pp. 1 2, Digital Equipment Corp.9 *IP Authentication Header, R. Atkinson, Naval Research Laboratory, pp. 1 26, Aug. 1995.10IP Authentication Header, R. Atkinson, Naval Research Laboratory, pp. 1-26, Aug. 1995.11 *IP Encapsulating Security Payload (ESP), R. Atkinson, Naval Research Laboratory, pp. 1 24, Aug. 1995.12IP Encapsulating Security Payload (ESP), R. Atkinson, Naval Research Laboratory, pp. 1-24, Aug. 1995.13 *Kerberos Network Authentication Service (V5), Digital Equipment Corporation, pp. 1 106, Sep. 1993.14Kerberos Network Authentication Service (V5), Digital Equipment Corporation, pp. 1-106, Sep. 1993.15 *Security Architecture for the Internet Protocol, R. Atkinson, Naval Research Laboratory, pp. 1 44, Aug. 1995.16Security Architecture for the Internet Protocol, R. Atkinson, Naval Research Laboratory, pp. 1-44, Aug. 1995.17 *Simple Key Management For Internet Protocols (SKIP), Ashar Aziz, et al. Sun Microsystems, Inc., pp. 1 72, Dec. 1995.18Simple Key-Management For Internet Protocols (SKIP), Ashar Aziz, et al. Sun Microsystems, Inc., pp. 1-72, Dec. 1995.19 *swIPe IP Security Protocol, Columbia University and AT&T, John Ioannidis and Matt Blaze, Dec. 1993.20 *The Photuris Session Key Management Protocol, P. Karn, Qualcomm, W.A. Simpson, DayDreamer, pp. 1 106, Nov. 1995.21The Photuris Session Key Management Protocol, P. Karn, Qualcomm, W.A. Simpson, DayDreamer, pp. 1-106, Nov. 1995.22 *U.S. application No. 08/561,790, filed Nov. 22, 1994, Kirby et al. Controlling Passage Of Packets Or Messages.23U.S. application No. 08/561,790, filed Nov. 22, 1994, Kirby et al.--Controlling Passage Of Packets Or Messages.24 *U.S. application No. 08/585,765, filed Jan. 12, 1995, Kirby et al. Data Encryption/Decryption For Network Communication.25U.S. application No. 08/585,765, filed Jan. 12, 1995, Kirby et al.--Data Encryption/Decryption For Network Communication.26 *U.S. application No. 08/586,231, filed Jan. 12, 1995, Levesque et al. Key Management For Network Communication.27U.S. application No. 08/586,231, filed Jan. 12, 1995, Levesque et al.--Key Management For Network Communication.28 *World Wide Web document of Digital Equipment Corporation s tunneling product, Nov. 15, 1995.29World Wide Web document of Digital Equipment Corporation's tunneling product, Nov. 15, 1995.* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS6141755 *Apr 13, 1998Oct 31, 2000The United States Of America As Represented By The Director Of The National Security AgencyFirewall security apparatus for high-speed circuit switched networksUS6148337 *Apr 1, 1998Nov 14, 2000Bridgeway CorporationMethod and system for monitoring and manipulating the flow of private information on public networksUS6170057 *Oct 16, 1997Jan 2, 2001Kabushiki Kaisha ToshibaMobile computer and method of packet encryption and authentication in mobile computing based on security policy of visited networkUS6223285 *Oct 24, 1997Apr 24, 2001Sony Corporation Of JapanMethod and system for transferring information using an encryption mode indicatorUS6230186 *Apr 28, 1998May 8, 2001Rhoda YakerPrivate electronic message systemUS6298445 *Apr 30, 1998Oct 2, 2001Netect, Ltd.Computer securityUS6308276Sep 7, 1999Oct 23, 2001Icom TechnologiesSS7 firewall systemUS6438612 *Sep 11, 1998Aug 20, 2002Ssh Communications Security, Ltd.Method and arrangement for secure tunneling of data between virtual routersUS6636520 *Dec 21, 1999Oct 21, 2003Intel CorporationMethod for establishing IPSEC tunnelsUS6708218Jun 5, 2000Mar 16, 2004International Business Machines CorporationIpSec performance enhancement using a hardware-based parallel processUS6738909 *Sep 2, 1999May 18, 2004International Business Machines CorporationMethod and apparatus for automatic configuration for internet protocol security tunnels in a distributed data processing systemUS6952768Dec 7, 2000Oct 4, 2005Hewlett-Packard Development Company, L.P.Security protocolUS6993582 *Oct 21, 2003Jan 31, 2006Micron Technology Inc.Mixed enclave operation in a computer networkUS6993651Dec 7, 2000Jan 31, 2006Hewlett-Packard Development Company, L.P.Security protocolUS7003118Nov 27, 2000Feb 21, 20063Com CorporationHigh performance IPSEC hardware accelerator for packet classificationUS7010702 *Nov 9, 2000Mar 7, 2006Vpnet Technologies, Inc.Architecture for virtual private networksUS7028182 *Jan 26, 2000Apr 11, 2006Nexsys Electronics, Inc.Secure network system and method for transfer of medical informationUS7036010 *Dec 7, 2000Apr 25, 2006Hewlett-Packard Development Company, L.P.Method and apparatus for a secure communications session with a remote system via an access-controlling intermediate systemUS7051199 *Jun 19, 2000May 23, 2006Xerox CorporationSystem, method and article of manufacture for providing cryptographic services utilizing a networkUS7072363Dec 29, 2000Jul 4, 2006Cisco Technology, Inc.Method and device for securely communicating information via a DSL networkUS7110548 *Aug 2, 1999Sep 19, 2006Hatachi LtdCryptographic communication method, encryption algorithm shared control method, encryption algorithm conversion method and network communication systemUS7177427Sep 18, 2000Feb 13, 2007Sony CorporationMethod and system for transferring information using an encryption mode indicatorUS7213262May 10, 1999May 1, 2007Sun Microsystems, Inc.Method and system for proving membership in a nested group using chains of credentialsUS7237107Dec 7, 2000Jun 26, 2007Hewlett-Packard Development Company, L.P.Method and apparatus for discovering a trust chain imparting a required attribute to a subjectUS7243202Mar 27, 2002Jul 10, 2007Stmicroelectronics LimitedSearching for packet identifiersUS7308706Oct 28, 2002Dec 11, 2007Secure Computing CorporationAssociative policy modelUS7340601Dec 7, 2000Mar 4, 2008Hewlett-Packard Development Copmany, L.P.Electronic certificateUS7349391 *Mar 19, 1999Mar 25, 2008F5 Networks, Inc.Tunneling between a bus and a networkUS7370194Jun 10, 2002May 6, 2008Microsoft CorporationSecurity gateway for online console-based gamingUS7406595May 5, 2004Jul 29, 2008The United States Of America As Represented By The Director, National Security AgencyMethod of packet encryption that allows for pipeliningUS7444506 *Jun 15, 2006Oct 28, 2008Ragula SystemsSelective encryption with parallel networksUS7536715 *Nov 25, 2002May 19, 2009Secure Computing CorporationDistributed firewall system and methodUS7581247Apr 17, 2006Aug 25, 2009Symantec Operating CorporationNetwork address translation gateway for networks using non-translatable port addressesUS7606861Jul 22, 2002Oct 20, 2009Nexsys ElectronicsMedical network system and method for transfer of informationUS7617527Nov 10, 2009Avaya Inc.Architecture for virtual private networksUS7624180Nov 24, 2009Micron Technology, Inc.Mixed enclave operation in a computer networkUS7650495Jan 19, 2010Microsoft CorporationSecurity gateway for online console-based gamingUS7681032 *Mar 16, 2010Portauthority Technologies Inc.System and method for monitoring unauthorized transport of digital contentUS7721084Nov 22, 2002May 18, 2010Stonesoft CorporationFirewall for filtering tunneled data packetsUS7730298 *Nov 22, 2004Jun 1, 2010Hubspan Inc.Method and apparatus for translating information between computers having different security managementUS7797423Jul 11, 2007Sep 14, 2010Round Rock Research, LlcComputerized access device with network securityUS7814208Oct 12, 2010Science Applications International CorporationSystem and method for projecting content beyond firewallsUS7827291Jul 11, 2007Nov 2, 2010Round Rock Research, LlcSystem for providing security for ad hoc networked computerized devicesUS7831722Nov 9, 2010Round Rock Research, LlcPortable communications device with enhanced securityUS7844706Jul 11, 2007Nov 30, 2010Round Rock Research, LlcPortable computerized device with network securityUS7904565Jul 11, 2007Mar 8, 2011Round Rock Research, LlcSystem for providing security in a network comprising communications devicesUS7917630Jul 11, 2007Mar 29, 2011Round Rock Research, LlcPortable computerized device adapted for ad hoc security associationsUS7917631Jul 11, 2007Mar 29, 2011Round Rock Research, LlcSystem for providing security in a network comprising computerized devicesUS7970900Jun 28, 2011Round Rock Research, LlcMethod and system for establishing a security perimeter in computer networksUS7979556Jul 12, 2011Round Rock Research, LlcMethods for providing security for ad hoc networked computerized devicesUS8028067Sep 27, 2011Round Rock Research, LLPMethods of operating a portable communications device with enhanced securityUS8104082Jan 24, 2012Certes Networks, Inc.Virtual security interfaceUS8165140Apr 24, 2012Symantec CorporationNetwork address translation gateway for local area networks using local IP addresses and non-translatable port addressesUS8281139Oct 2, 2012Portauthority Technologies Inc.System and method for monitoring unauthorized transport of digital contentUS8300824 *Oct 30, 2012Cisco Technology, Inc.System and method for encrypting data using a cipher text in a communications environmentUS8346925Dec 10, 2010Jan 1, 2013Round Rock Research, LlcApparatus for providing security over untrusted networksUS8407350Feb 2, 2007Mar 26, 2013Science Applications International CorporationSystem and method for projecting content beyond firewallsUS8478996Dec 21, 2009Jul 2, 2013International Business Machines CorporationSecure Kerberized access of encrypted file systemUS8495366Apr 18, 2012Jul 23, 2013International Business Machines CorporationSecure kerberized access of encrypted file systemUS8607301Sep 27, 2006Dec 10, 2013Certes Networks, Inc.Deploying group VPNS and security groups over an end-to-end enterprise networkUS8756429Oct 10, 2008Jun 17, 2014International Business Machines CorporationTunable encryption systemUS8844016Aug 21, 2012Sep 23, 2014Portauthority Technologies, Inc.System and method for monitoring unauthorized transport of digital contentUS8874768Dec 10, 2010Oct 28, 2014Round Rocks Research, LLCMethods for providing security over untrusted networksUS8976798 *Jan 28, 2003Mar 10, 2015Hughes Network Systems, LlcMethod and system for communicating over a segmented virtual private network (VPN)US20010005841 *Dec 7, 2000Jun 28, 2001Hewlett-Packard CompanyElectronic certificateUS20010010076 *Dec 7, 2000Jul 26, 2001Hewlett-Packard CompanySecurity protocolUS20010014943 *Dec 7, 2000Aug 16, 2001Hewlett-Packard CompanyMethod and apparatus for discovering a trust chain imparting a required attribute to a subjectUS20010018007 *Apr 2, 2001Aug 30, 2001Franz-Josef PuttmannApparatus and method for the longitudinal splitting of pipes laid undergroundUS20010023482 *Dec 7, 2000Sep 20, 2001Hewlett-Packard CompanySecurity protocolUS20020013848 *Jun 8, 2001Jan 31, 2002Hewlett-Packard CompanySecure network communicationsUS20020099668 *Jan 22, 2001Jul 25, 2002Sun Microsystems, Inc.Efficient revocation of registration authoritiesUS20020129140 *Dec 6, 2001Sep 12, 2002Ariel PeledSystem and method for monitoring unauthorized transport of digital contentUS20020154636 *Mar 27, 2002Oct 24, 2002Stmicroelectronics LimitedSearching for packet identifiersUS20020184487 *Mar 23, 2001Dec 5, 2002Badamo Michael J.System and method for distributing security processing functions for network applicationsUS20030037235 *May 15, 2002Feb 20, 2003Sun Microsystems, Inc.System for signatureless transmission and reception of data packets between computer networksUS20030115328 *Nov 22, 2002Jun 19, 2003Riku SalminenFirewall for filtering tunneled data packetsUS20030126468 *Nov 25, 2002Jul 3, 2003Markham Thomas R.Distributed firewall system and methodUS20030147403 *Jan 28, 2003Aug 7, 2003John BorderMethod and system for communicating over a segmented virtual private network (VPN)US20030149732 *Feb 4, 2003Aug 7, 2003Vidius Inc.Apparatus and method for controlling unauthorized dissemination of electronic mailUS20030219022 *Jan 28, 2003Nov 27, 2003Hughes ElectronicsMethod and system for utilizing virtual private network (VPN) connections in a performance enhanced networkUS20030229779 *Jun 10, 2002Dec 11, 2003Morais Dinarte R.Security gateway for online console-based gamingUS20040083286 *Oct 21, 2003Apr 29, 2004Micron Technology, Inc.Mixed enclave operation in a computer networkUS20040083382 *Oct 28, 2002Apr 29, 2004Secure Computing CorporationAssociative policy modelUS20050025291 *Aug 27, 2004Feb 3, 2005Vidius Inc.Method and system for information distribution managementUS20050175184 *Feb 11, 2004Aug 11, 2005Phonex Broadband CorporationMethod and apparatus for a per-packet encryption systemUS20050235346 *Mar 2, 2005Oct 20, 2005Coley Christopher DMethod for transparently forming a connection to an element of a private network over an IP-compliant networkUS20050235347 *Mar 2, 2005Oct 20, 2005Coley Christopher DMethod for eliminating source-based routing by a device disposed between an IP-compliant network and private network elementsUS20050235348 *Mar 3, 2005Oct 20, 2005Coley Christopher DSystem for preventing unwanted access to information on a computerUS20050235359 *Mar 1, 2005Oct 20, 2005Coley Christopher DMethod for resisting a denial-of-service attack of a private network elementUS20050240992 *Mar 2, 2005Oct 27, 2005Coley Christopher DMethod for controlling access to a web server operating on an IP-compliant networkUS20050248471 *Jul 3, 2003Nov 10, 2005Iconlab, IncMethod and apparatus for displaying a time-varying code to a handheld terminal, and method and apparatus for approval authentication processing by using the sameUS20060020800 *Sep 28, 2005Jan 26, 2006Holden James MMixed enclave operation in a computer networkUS20060021020 *Jun 16, 2005Jan 26, 2006Graphon CorporationMethod for directly connecting an inherently secure computer to a private network elementUS20060112265 *Nov 22, 2004May 25, 2006Hubspan Inc.Method and apparatus for translating information between computers having different security managementUS20060129792 *Dec 30, 2005Jun 15, 2006Bots Henk JArchitecture for virtual private networksUS20060185010 *Apr 17, 2006Aug 17, 2006Symantec CorporationNetwork address translation gateway for local area networks using local IP addresses and non-translatable port addressesUS20060288408 *Aug 11, 2006Dec 21, 2006Graphon CorporationVirtual private networkUS20070136480 *Feb 2, 2007Jun 14, 2007Science Applications International CorporationSystem and method for projecting content beyond firewallsUS20080010454 *Jul 11, 2007Jan 10, 2008Micron Technology, Inc.Computerized access device with network securityUS20080010461 *Jul 11, 2007Jan 10, 2008Micron Technology, Inc.Portable communications device with enhanced securityUS20080016226 *Jul 11, 2007Jan 17, 2008Micron Technology, Inc.Portable computerized device adapted for ad hoc security associationsUS20080016227 *Jul 11, 2007Jan 17, 2008Micron Technology, Inc.Method and system for establishing a security perimeter in computer networksUS20080016332 *Jul 11, 2007Jan 17, 2008Micron Technology, Inc.System for providing security in a network comprising communications devicesUS20080016340 *Jul 11, 2007Jan 17, 2008Micron Technology, Inc.System for providing security for ad hoc networked computerized devicesUS20080016343 *Jul 11, 2007Jan 17, 2008Micron Technology, Inc.Methods of operating a portable communications device with enhanced securityUS20080016344 *Jul 11, 2007Jan 17, 2008Micron Technology, Inc.System for providing security in a network comprising computerized devicesUS20080104692 *Sep 29, 2006May 1, 2008Mcalister DonaldVirtual security interfaceUS20080127327 *Sep 27, 2006May 29, 2008Serge-Paul CarrascoDeploying group VPNS and security groups over an end-to-end enterprise networkUS20080177997 *Mar 24, 2008Jul 24, 2008Microsoft CorporationSecurity gateway for online console-based gamingUS20090059940 *Nov 12, 2008Mar 5, 2009Israel Daniel SultanNetwork address translation gateway for local area networks using local ip addresses and non-translatable port addressesUS20100023754 *Oct 7, 2009Jan 28, 2010Portauthority Technologies Inc.System and method for monitoring unauthorized transport of digital contentUS20100064352 *Nov 13, 2009Mar 11, 2010Micron Technology, Inc.Mixed enclave operation in a computer networkUS20100095127 *Oct 10, 2008Apr 15, 2010International Business Machines CorporationTunable encryption systemUS20110088089 *Apr 14, 2011Research In Motion LimitedMethod, apparatus and system for managing packet deliveryUS20110154031 *Jun 23, 2011International Business Machines CorporationSecure Kerberized Access of Encrypted File SystemUS20110197068 *Dec 10, 2010Aug 11, 2011Holden James MMethods for providing security over untrusted networksUS20110202758 *Dec 10, 2010Aug 18, 2011James M HoldenApparatus for providing security over untrusted networksUS20110258444 *Oct 20, 2011Intel CorporationNetwork Controller DecryptionUS20130282934 *Jun 20, 2013Oct 24, 2013Microsoft CorporationMethods and Systems for Protecting Data in USB SystemsEP1246424A1 *Mar 27, 2001Oct 2, 2002Sgs-Thomson Microelectronics Ltd.Searching for packet identifiersEP1283630A2 *Aug 1, 2002Feb 12, 2003Itt Manufacturing Enterprises, Inc.Network routing using an untrusted routerEP1317115A2 *Nov 21, 2002Jun 4, 2003Stonesoft CorporationA firewall for filtering tunneled data packetsEP1372315A2 *Apr 30, 2003Dec 17, 2003Microsoft CorporationSecurity gateway for online console-based gamingEP2323321A1Oct 9, 2009May 18, 2011Research In Motion LimitedMethod, apparatus and system for managing packet deliveryWO2001067258A1 *Feb 27, 2001Sep 13, 2001Nexland, Inc.Network address translation gateway for local area networks using local ip addresses and non-translatable port addresses* Cited by examinerClassifications U.S. Classification713/153International ClassificationG06F1/00, H04L29/06Cooperative ClassificationH04L2212/00, H04L69/22, H04L63/0272, H04L63/0236, H04L63/0807, H04L29/06European ClassificationH04L63/02B1, H04L63/08A, H04L63/02C, H04L29/06Legal EventsDateCodeEventDescriptionOct 18, 2002FPAYFee paymentYear of fee payment: 4May 13, 2003ASAssignmentOwner name: AXENT TECHNOLOGIES I, INC., MARYLANDFree format text: MERGER/CHANGE OF NAME;ASSIGNOR:RAPTOR SYSTEMS INC.;REEL/FRAME:014051/0126Effective date: 19991228Owner name: SYMANTEC ATI CORPORATION, MARYLANDFree format text: MERGER;ASSIGNOR:AXENT TECHNOLOGIES I, INC.;REEL/FRAME:014051/0066Effective date: 20010927Owner name: SYMANTEC CORPORATION, CALIFORNIAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SYMANTEC ATI CORPORATION;REEL/FRAME:014051/0236Effective date: 20030428Oct 4, 2006FPAYFee paymentYear of fee payment: 8Oct 27, 2010FPAYFee paymentYear of fee payment: 12Mar 15, 2011RRRequest for reexamination filedEffective date: 20101203Mar 27, 2012B1Reexamination certificate first reexaminationFree format text: THE PATENTABILITY OF CLAIMS 1-13, 16, 18-19 AND 22-26 IS CONFIRMED. CLAIMS 14-15, 17 AND 20-21 ARE CANCELLED.RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services