Computer remote control system and method based on serial port connection

Abstract

The invention relates to a computer remote control system and method based on serial port connection. The system comprises a control end, a controlled end, a transfer end, and a mail server. The control end is a computer far from the controlled end in spatial distance, receives and sends electronic mails via the Internet, sends control instructions and finally displays an execution result frame. The controlled end is a core computer installed on a production line inside an enterprise, is connected with the internal network of the enterprise, and has a remote assistance request. The transfer end is an internal-network computer and is in communication connection with the controlled end and the mail server via the internal network, and receives and sends the electronic mails from and to external units via the mail server. The mail server is disposed inside the enterprise. The transfer end receives and sends the electronic mails from and to external units via the mail server. The computer remote control system carries out communication via the RS232 serial port of a computer, guarantees the internal network a physically isolated state, prevents harm of virus attack on a whole system, and achieves remote control when the controlled computer is not connected with the external units via a network cable.

Description

technical field [0001] The invention relates to a computer remote control technology, in particular to a computer remote control system and method based on serial port connection. Background technique [0002] Enterprises generally have their own internal network, which is connected to the Internet through security devices such as gateways and firewalls. Some enterprise internal networks do not even allow Internet access and can only send and receive emails. Some enterprises distinguish multiple internal networks according to different purposes, such as the third-level network for users' daily work, and the first-level network for automatic control. For security reasons, such a level 1 network is itself physically isolated from the full level 3 network. If the computer on such a special occasion needs remote assistance and remote technical support, it cannot be realized when other networks are physically isolated. [0003] For example, the first-level network of the automa...

AI Technical Summary

Problems solved by technology

However, there is a great potential safety hazard in this way. The actual situation is: the computer operating system under the first-level network is still a very old Windows2000 system. The system itself has many loopholes and lacks security protection. The system is extremely vulnerable to various viruses. Attack, even if it is not attacked by the external network, it is likely to be attacked by other computers infected with viruses. It is necessary to ensure that the network is closed to ensure the security of the entire system. Therefore, the dual network card solution mentioned above is not feasible.

[0004] Therefore, in the existing computer remote control method, the controlled computer must be directly or indirectly connected to the Internet through wired or wireless means, and then use some remote control third-party software to achieve the purpose of remote control, but for a computer that needs to be strictly connected with the Internet These control methods are not suitable for a specific internal network that is physically isolated from the enterprise, because this specific network cannot be connected to the Internet or even other internal networks of the enterprise according to the system.

[0005] At the same time, in the existing computer remote control method, the controlled computer must be directly or indirectly connected to the Internet through wired or wireless means. As long as it is connected to the network, there is a risk of being attacked by worms and hackers.

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