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System and device for preventing IP address from leakage

An IP address and address technology, which is applied in the field of Internet technology and access network, can solve the problems of easy leakage of IP addresses, and achieve the effects of reducing broadcast message transmission, preventing users from eavesdropping, and saving network bandwidth resources

Active Publication Date: 2011-07-20
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0030] The technical problem to be solved by the present invention is to provide a system and equipment for preventing IP address leakage, which overcomes the problem of simply using broadcast marks in the prior art to determine DHCP Relay's response to DHCP reports. The forwarding method of the file, resulting in the disadvantage that the IP address assigned by the DHCP server is easily leaked

Method used

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  • System and device for preventing IP address from leakage
  • System and device for preventing IP address from leakage
  • System and device for preventing IP address from leakage

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Experimental program
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Embodiment Construction

[0045] Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

[0046] Main point of the present invention is when DHCP client (Dynamic Host Configuration Protocol client) and DHCPserver (Dynamic Host Configuration Protocol server) are not in an IP subnet, DHCP Relay (Dynamic Host Configuration Protocol relay equipment) or started DHCP Relay agent ( The DSLAM of the Dynamic Host Configuration Protocol relay agent) service records the MAC address of the DHCP client according to the DHCP DISCOVER / REQUEST message sent by the DHCP client, and records the user port address sending the message when receiving the DISCOVER / REQUESTIP message; then Establish the corresponding relationship between the MAC address and the user port address. After receiving the response message sent by the DHCP server, the DHCP Relay or DSLAM device finds the MAC address according to the chaddr field in the DHCP message; The corresponding relatio...

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PUM

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Abstract

The invention discloses a system for preventing an IP address from being leaked, which comprises a dynamic host configuration protocol (DHCP) repeater equipment. The invention comprises the following steps: the DHCP repeater equipment capturing a DHCP message sent by a DHCP client and recording a user port address for sending the message; searching a medium access control (MAC) address of the DHCP client from the client hardware address field of the message; establishing corresponding relation between the MAC address and the user port address. The invention also includes the DHCP repeater equipment. The technical scheme provided by the invention effectively prevents the interception of a user, enhances the application safety of a DHCP protocol, simultaneously reduces the broadcast message transmission of a two-layer network, and saving the network bandwidth resources.

Description

technical field [0001] The invention relates to the technical field of Internet (Internet) and the technical field of access network, in particular to a system and equipment for preventing IP address leakage. Background technique [0002] Dynamic Host Configuration Protocol (DHCP, Dynamic Host Configuration Protocol) is a terminal automatic configuration protocol, and RFC2131, 2132, and 1542 provide its implementation standards. The DHCP protocol is implemented in a client-server manner. The DHCP protocol is an application based on the UDP layer. The DHCP terminal (also called the DHCP client, DHCP client) is identified by the well-known port number 68, and the DHCP server (DHCP server) is identified by the well-known port number 68. Port number 67 for identification. The DHCP protocol can support a variety of terminal devices, and the entire configuration process is automatically realized, and the terminal does not need to be configured, which can achieve the goal of users...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/12H04L12/24H04L12/56H04L45/74
Inventor 邓雄袁远
Owner HUAWEI TECH CO LTD