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System and method for network address translation integration with IP security

  • US 20030149899A1
  • Filed: 03/12/2003
  • Published: 08/07/2003
  • Est. Priority Date: 01/29/1999
  • Status: Active Grant
First Claim
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1. A method of operating a virtual private network (VPN) based on IP Sec that integrates network address translation (NAT) with IP Sec processing, comprising the steps of:

  • configuring a NAT IP address pool;

    configuring a VPN connection to utilize said NAT IP address pool;

    obtaining a specific IP address from said NAT IP address pool, and allocating said specific IP address for said VPN connection;

    starting said VPN connection;

    loading to an operating system kernal the security associations and connection filters for said VPN connection;

    processing a IP datagram for said VPN connection; and

    applying VPN NAT to said IP datagram.

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