A Fast Reconnection Method Applicable to Virtual Private Network

Abstract

The invention discloses a fast reconnection method suitable for a virtual private network (VPN). The method comprises the following steps: 1, a VPN client applies a session sequence number from a VPN server; 2, the VPN server generates the session sequence number, returns the session sequence number to the VPN client, and locally establishes a session sequence number table; 3, when monitoring that a network connection is broken, the VPN client sends a data packet that carries the session sequence number to the VPN server; 4, after network recovery, the VPN server searches the session sequence number table and takes out an address structure adopted by the VPN client before network recovery; 5, the VPN server updates the address structure adopted by the VPN client before network recovery; and 6, the VPN client starts a normal encrypted access to the VPN server through the current address information. According to the fast reconnection method disclosed by the invention, when the network environment changes, the VPN client can reduce the time and traffic overhead required for reestablishing a tunnel by adding a session layer.

Description

Technical field [0001] The invention belongs to the technical field of network security, and particularly relates to a fast reconnection method suitable for a virtual private network. Background technique [0002] With the popularization of virtual private network (VPN) technology, VPN technology has supported mobile devices. Mobile devices install VPN clients and access the network (Wlan network or mobile network) to access the private network. [0003] However, the network signal is still unstable, and mobile devices often change positions, causing continuous switching of network signals, including Wlan to 2 / 3 / 4G, or between different base stations in the same 2 / 3 / 4G network. The security implementation of VPN technology relies on the tunnel, and the continuous dependence of the tunnel on the network information used when it is established. When the network information changes, the tunnel cannot be sustained and VPN technology cannot be implemented safely. [0004] For the secure...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention: After the network is disconnected and recovered (or network switching) in the existing VPN technology, the VPN client needs a lot of time and traffic to continue the access of the encrypted application and re-establish the tunnel, and proposes A fast reconnection method suitable for virtual private networks is proposed. This method can quickly restore the tunnel on the VPN client when the network environment changes, ensuring the smooth use of encrypted applications. It is suitable for mobile phones and tablets with limited network traffic and power. of mobile devices save resources and improve user experience

Images