A method of binding source ip on a windows host using a virtual network card

A virtual network card and host technology, applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve the problem of IP datagram loss of transparency and achieve the effect of source address masquerading and flexible source address masquerading

Active Publication Date: 2017-06-06
KOAL SOFTWARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] However, when the strong host sending behavior is used with the VPN based on the virtual network card, the IP datagram passing through the VPN tunnel will lose transparency, that is, the source IP address of the IP datagram received by the remote receiving host will be the virtual network card. IP address, to make the VPN tunnel transparent to user datagrams, the source IP address of the IP datagram received by the remote receiving host must be the IP address of the physical network card that the sending host should pass through when it does not pass through the VPN tunnel

Method used

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  • A method of binding source ip on a windows host using a virtual network card
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  • A method of binding source ip on a windows host using a virtual network card

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[0043] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0044] The scheme of binding the source IP on the Windows host using the virtual network card provided by the present invention uses the LSP technology of Windows to dynamically intercept the data packets sent to the virtual network card, and sets its source IP address as the IP address of a non-virtual network card.

[0045] The virtual network card involved in this solution: use software to simulate the network environment. The network interface card simulated by software does not need the support of hardware chips, and can import data packets to any place.

[0046] Involved LSP (Layered Service Provider): The Chinese name is layered service provider, which is a mechanism provided by Windows in Socket implementation, allowing one or more Laye...

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Abstract

The invention discloses a method for binding a source IP on a Windows host using a virtual network card. The method uses the LSP technology of Windows to dynamically intercept the data packets sent to the virtual network card, and sets its source IP address as a non-virtual network card. The IP address of the network card. This method can bind the source IP address for the data packet without modifying the application program.

Description

technical field [0001] The invention relates to network data transmission technology, in particular to the technology of binding source IP on a Windows host using a virtual network card. Background technique [0002] When an operating system such as Windows is not used as a router, its behavior when sending data packets follows the strong host mode defined by RFC1122. The specific process is as follows figure 1 shown. [0003] This method simplifies the user's configuration, and selects a source IP address for the IP datagram through the routing table in the system. [0004] However, when the strong host sending behavior is used with the VPN based on the virtual network card, the IP datagram passing through the VPN tunnel will lose transparency, that is, the source IP address of the IP datagram received by the remote receiving host will be the virtual network card. IP address, to make the VPN tunnel transparent to the user datagram, the source IP address of the IP datagram...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/70H04L12/741H04L45/74
Inventor 赵亚掌晓愚韩洪慧叶寒
Owner KOAL SOFTWARE CO LTD
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