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FTP-based access control method and device

An access control and FTP server technology, which is applied in the communication field, can solve problems such as business anomalies, inability to know FTP data channel information, and inability to determine FTP control channels, etc., to achieve the effect of avoiding business anomalies

Active Publication Date: 2021-06-11
HANGZHOU DPTECH TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in some specific scenarios, in order to meet security requirements, etc., the FTP server will use a custom port instead of a fixed port to send and receive FTP control packets. For the FTP data channel information negotiated under the FTP control channel, the gateway and other devices will not be able to perform access control on the FTP data packets transmitted under the subsequent FTP data channel, resulting in business exceptions and other problems.

Method used

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  • FTP-based access control method and device
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  • FTP-based access control method and device

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Embodiment Construction

[0027] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.

[0028] The terminology used in this application is for the purpose of describing particular embodiments only, and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term...

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Abstract

The invention discloses an FTP-based access control method and device, and the method comprises the steps: judging whether an FTP server side port number in a flowing TCP message quintuple hits an FTP control channel port table or not, and extracting and storing FTP data channel information in a load if the FTP server side port number hits the FTP control channel port table; if not, detecting whether the TCP message is an FTP control message, and if yes, adding an FTP server side port number into an FTP control channel port table and extracting and storing FTP data channel information; and performing access control on the FTP data message based on the FTP data channel information. According to the scheme, the FTP control channel port table is created and dynamically updated, the TCP message hitting the table is determined to be the FTP control message, and when the FTP server receives and sends the FTP control message through the user-defined port, the FTP control message can be effectively recognized, FTP data channel information is extracted, and access control is carried out so as to avoid the problems such as business abnormity.

Description

technical field [0001] The present application relates to the technical field of communications, in particular to an FTP-based access control method and device. Background technique [0002] In the interactive process based on FTP (File Transfer Protocol, file transfer protocol), two network channels will be constructed: FTP control channel and FTP data channel, where the FTP control channel is used to transmit control commands, and the FTP data channel is used to transmit data file. The FTP client and the FTP server will use the FTP control channel to negotiate, so as to determine the information of the FTP data channel, and use the FTP data channel to complete subsequent file transfers. [0003] Because the FTP server generally uses a fixed port to send and receive FTP control messages, that is, the FTP control channel is fixed at the port on the FTP server side. Monitoring is performed to obtain the FTP data channel information negotiated between the FTP client and the ...

Claims

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Application Information

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IPC IPC(8): H04L29/08H04L29/06
CPCH04L67/06H04L63/10Y02D30/50
Inventor 赵艳丽
Owner HANGZHOU DPTECH TECH
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