Virtual private network implementation method and client device

Abstract

The embodiment of the invention provides a virtual private network implementation method and a client device. The virtual private network implementation method provided by the invention comprises the following steps that: a NDIS ((Network Driver Interface Specification) interlayer driver captures a message transmitted to an intranet server by an application program, and according to a process identification PID corresponding to the message, judges whether to allow a process corresponding to the message to use the SSL VPN; if so, the NDIS interlayer driver establishes a new message, sets a destination address of the new message as native address of the client device, sets a destination port number of the new message as a port number for a client to receive the message, modifies a source IP address of the original message to be a virtual IP address, takes the original message as load of the new message, and submits the new message to a NDIS network card driver; and the NDIS network card driver transmits the new message to the client, and the client transmits the new message to the intranet server. The embodiment of the invention realizes a virtual private network based on process control, and starting speed of the client is fast.

Description

technical field [0001] The embodiment of the present invention relates to computer technology, and in particular to a virtual private network implementation method and a client device. Background technique [0002] A virtual private network (Virtual Private Network, referred to as VPN) is a safe and stable tunnel passing through a public network. Through the packet and encrypted transmission of network data, a temporary and secure connection is established in a public network, so as to realize the transmission of private data on the public network and achieve the security level of a private network. Two commonly used VPN technologies are VPN technology based on traditional network security protocols and VPN technology based on Secure Socket Layer (Security Socket Layer, SSL for short). The former mainly acts on the network layer, while the latter mainly acts on the application layer. SSLVPN is an SSL-based VPN technology. It uses certificate-based identity authentication, d...

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Problems solved by technology

[0005] Embodiments of the present invention provide a method for implementing a virtual private network and a client device, so as to solve the problem that in the prior art, the control of process access cannot be realized, and when starting the client, the virtual network card needs to be started at the same time, and the client starts slowly. question

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