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Method for filtering internet protocol packet in user housing apparatus

An Internet protocol and Internet technology, applied in data exchange details, telephone structure, electrical components, etc., can solve the problems of no defense, inability to monitor and control intruders, and inability to monitor or control external intruders, etc.

Inactive Publication Date: 2003-03-12
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, ATU-R can operate IP packet filtering in only IP routing mode, so if there is an external intruder such as a hacker in bridge mode, ATU-R cannot perform monitoring and control of the intruder
[0005] As mentioned earlier, the main problem with the ATU-R, one of the CPEs, is that in bridge mode it is assigned IP to CPE becomes completely open to external intruders without defense if exposed to the outside

Method used

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  • Method for filtering internet protocol packet in user housing apparatus
  • Method for filtering internet protocol packet in user housing apparatus
  • Method for filtering internet protocol packet in user housing apparatus

Examples

Experimental program
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Embodiment Construction

[0018] Turning now to the attached drawings, figure 1 It is a schematic diagram of an ADSL system that demonstrates xDSL. See figure 1 , The ADSL central transceiver unit (ATU-C) 102 located in the central office and the ADSL remote transceiver unit (ATU-R) 103 corresponding to the customer premises equipment (CPE) located in the user area use the traditional twisted pair through the ADSL 108 And connected to each other. The ATU-R 104 is then connected to the PC 106 through the Ethernet link 110. Finally, the PC 106 user connects to the network 100 such as the Internet via the ADSL 108 and the ATU-C 102 through the ATU-R 104.

[0019] On the other hand, the ATU-R 104 can be used in either IP routing mode or bridge mode, but bridge mode is used in most cases. In the past, ATU-R was used to analyze IP packets sent and received from PCs only in routing mode and to control IP packets according to filtering rules. That is, the ATU-R can operate IP packet filtering in the IP routing m...

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PUM

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Abstract

The present invention includes a method for preventing any external intruder by filtering an Internet Protocol packet in customer premise equipment connected between a personal computer (PC) and a digital subscriber line (xDSL) when it is operated in a bridge mode. To this end, the present invention provides the method including the steps of: detecting a destination IP address by analyzing the IP packet to be transmitted to the other party as a PC user access to an Internet through xDSL; registering the destination IP address to a predetermined allowance table; detecting a source IP address of the IP packet upon receiving the IP packet through xDSL; and checking whether the source IP address is duly registered to the allowance table for passing the corresponding IP packet through the PC only if the source IP address has been registered, and for blocking the corresponding IP packet if the source IP address has not been registered.

Description

[0001] This application refers to the following application, hereby incorporates it, and requests all benefits arising from the application under 35U.SC□19: It was submitted to the Korean Industrial Property Office on August 29, 2001 and assigned a serial number there. 52316 / 2001, titled "Method for Filtering Internet Protocol Packets in Customer Premises Equipment Used for Digital Subscriber Lines". Technical field [0002] The present invention relates to customer premises equipment (ie, “CPE”) connected between a personal computer (ie, “PC”) and a digital subscriber line (ie, “DSL”), and more specifically, to a filter used in The method of filtering Internet Protocol (ie "IP") packets in the user's residential equipment of the digital subscriber line. Background technique [0003] Generally, DSL, also known as "xDSL", is a high-speed modem technology that has been continuously developed to meet the growing needs of large-scale marke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/22H04L29/06
CPCH04L63/0236H04L12/22
Inventor 李保九
Owner SAMSUNG ELECTRONICS CO LTD