Server serial port disabling protection circuit and method

Abstract

The invention discloses a server serial port forbidding protection circuit which comprises a logic circuit module, the input end of the logic circuit module is connected with a first serial port interface module, the output end of the logic circuit module is connected with a second serial port interface module, and the control end of the logic circuit module is connected with an upper control module. The logic circuit module comprises a serial port sending end control circuit and a serial port receiving end control circuit, the control end of the serial port sending end control circuit is at ahigh level, the input end of the serial port sending end control circuit is connected with the output end path, the control end is at a low level, and the input end of the serial port sending end control circuit is disconnected with the output end path; the control end of the serial port receiving end control circuit is at a high level, and the input end of the serial port receiving end control circuit is communicated with the output end path; the control end is at a low level, and the serial port receiving end controls the input end and the output end of the circuit to be disconnected. The invention further discloses a serial port protection method, a hardware circuit of the server mainboard does not need to be additionally added, and the design flexibility is improved.

Description

technical field [0001] The invention relates to the technical field of server security, in particular to a server serial port disable protection circuit and method. Background technique [0002] UART is a serial port based on RS232 protocol that is ubiquitous on the server and is used for system debugging and as an external maintenance and inspection interface. Specifically, view system information, online debugging, etc. by connecting the serial cable. While the serial port brings convenience to the system maintenance, it also has great security risks. Once the serial port is used by malicious people, it can send malicious data to the system and other illegal operations, which will eventually bring harm to the application, cause business interruption, and endanger the security of the server. Therefore, the security of the serial port directly affects the security of the whole server. The security of the serial port is not considered in the prior art, as long as it is con...

AI Technical Summary

Problems solved by technology

The security of the serial port is not considered in the prior art, as long as it is connected to the debugging terminal equipment through the serial port line, the code debugging and maintenance of the system can be carried out, causing hidden dangers to the security of the server

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