Method for accessing and monitoring private network through layer 2 tunnel protocol and server

Abstract

The invention discloses a method for accessing and monitoring a private network through a layer 2 tunnel protocol (L2TP) and a server. The method comprises that: 'use of a default gateway on a remote network' set on an L2TP virtual interface of public network user equipment is canceled in advance; an L2TP server receives an L2TP call initiated by the public network user equipment, distributes a private network internet protocol (IP) address to the public network user equipment, and simultaneously sends the route of each monitored network segment to the public network user equipment; the public network user equipment receives each route, sets the L2TP virtual interface thereof for next hop of each route, and transmits each route to a routing table; the public network user equipment initiates an access request aiming at monitoring equipment of the private network, finds the route of the matched monitored network segment in the routing table according to the IP address of the monitoring equipment, and sends the access request to the L2TP server through the L2TP virtual interface according to the next hop of the route; and the L2TP server forwards the access request to the monitoring equipment. The method enables a public network user to normally access the public network and monitor the private network.

Description

Method and server for accessing and monitoring private network through Layer 2 Tunneling Protocol technical field The invention relates to the technical field of monitoring, in particular to a method for accessing and monitoring a private network through a Layer 2 Tunnel Protocol (L2TP, Layer 2 Tunnel Protocol), an L2TP server, and public network user equipment. Background technique With the continuous development of standardized and easily expandable network technology and Internet Protocol (IP, Internet Protocol) technology, intelligent monitoring technology based on IP and network has developed rapidly, and IP monitoring has become the mainstream of current monitoring. For security and cost reasons, most surveillance networks are deployed on private networks. Many mobile users or public network users as video clients (VC, VideoClient) want to access the monitoring resources of the private network, they will dial up through the Layer 2 Tunneling Protocol (L2TP, Layer2Tun...

AI Technical Summary

Problems solved by technology

If there are access restrictions or access prohibition at the export of the enterprise, it will affect the public network users, and also occupy and waste the bandwidth resources of the enterprise's export

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