A modular security gateway with multiple redundancy mechanisms

Abstract

This utility model discloses a modular security gateway with a multi-redundancy mechanism, including a chassis, a motherboard, and a power module, a hard drive module, and a network port module electrically connected to the motherboard. The motherboard is equipped with a main BIOS chip, a backup BIOS chip, and a chip switching circuit. The power module includes a main power supply, a backup power supply, and a power switching circuit. Both the main and backup power supplies support AC, DC, and open-circuit power input. The hard drive module consists of a hard drive pull-out enclosure and a hard drive enclosure mounting bracket, which supports hot-swapping. The network port module integrates at least four RJ45 electrical ports and at least one SFP optical port. The multi-redundancy design of the main and backup BIOS chips and the main and backup power supplies in this utility model significantly improves operational reliability, while optimizing interface compatibility and maintenance efficiency. It is suitable for critical infrastructure, finance, government and enterprise industrial scenarios.

Description

Technical Field

[0001] This utility model relates to the field of industrial control network security equipment technology, specifically to a modular security gateway with multiple redundancy mechanisms. Background Technology

[0002] Security gateways are high-performance network security devices designed specifically for industrial control scenarios. They must integrate high computing power with industrial-grade reliability to meet the needs of critical infrastructure for real-time threat protection, data encryption, and network traffic monitoring, ensuring high stability and long-term operation in industrial environments. Existing security gateways typically adopt a conventional hardware architecture, with the core structure including a chassis, motherboard, memory, hard drive, power supply, network ports, display, and heat dissipation components. These components are connected to the motherboard via cables to achieve power transmission and data communication. Additionally, some security gateways utilize network security processors to enhance packet processing and traffic encryption capabilities, adapting to the security requirements of enterprise networks and edge networks in the telecommunications sector.

[0003] However, with the increasing complexity of network architectures (such as multi-link hybrid networking and high-reliability service deployment), existing security gateways have gradually exposed many problems and are unable to meet the needs of actual applications:

[0004] Insufficient interface compatibility: Traditional security gateways have a limited number of interfaces (usually no more than 4 electrical ports) and a single type (only supporting single electrical or single optical ports), which cannot directly adapt to the mixed link scenario of "6 electrical ports + 2 optical ports". Additional external conversion equipment is required, which increases deployment costs, introduces new failure points, and reduces the overall stability of the network.

[0005] Lack of operational reliability: The power supply design is simple, supporting only one of AC or DC power supply methods. Once the power is lost, the equipment will stop, which cannot meet the needs of scenarios with high business continuity requirements such as finance and government enterprises; at the same time, the single BIOS design means that if the firmware is damaged or the upgrade fails, it requires professional personnel to repair, and the recovery time is usually no less than 2 hours, resulting in an extremely high risk of business interruption.

[0006] Poor ease of maintenance: The hard drive is installed internally, and disassembly is required for maintenance or expansion, which usually takes no less than 30 minutes. This is not only inefficient, but also damages the equipment's sealing. Furthermore, the equipment's operating status (such as temperature, network port connectivity / speed, and power operation mode) needs to be checked by logging into the backend system, making it impossible to intuitively perceive abnormalities. Maintenance personnel find it difficult to detect and handle faults in a timely manner, thus prolonging the problem-solving cycle. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a modular security gateway with a multi-redundancy mechanism.

[0008] This utility model discloses a modular security gateway with multiple redundancy mechanisms, including a chassis, a motherboard disposed inside the chassis, and a power module, a hard disk module and a network port module electrically connected to the motherboard;

[0009] The motherboard is provided with a main BIOS chip, a backup BIOS chip and a chip switching circuit. The chip switching circuit is electrically connected to the main BIOS chip and the backup BIOS chip respectively, and is used to switch between the main BIOS chip and the backup BIOS chip.

[0010] The power module includes a main power supply, a backup power supply, and a power switching circuit. Both the main power supply and the backup power supply support the input of any power source, such as AC power, DC power, or open-circuit power. The power switching circuit is used to switch between the main power supply and the backup power supply.

[0011] The hard drive module includes a hard drive pull-out box and a hard drive enclosure mounting bracket fixed inside the chassis. The hard drive is placed inside the hard drive pull-out box, which is hot-swappable to the hard drive enclosure mounting bracket, and the hard drive inside is electrically connected to the motherboard.

[0012] The network port module is integrated on the motherboard and includes at least four RJ45 electrical ports and at least one SFP optical port.

[0013] As a further improvement of this utility model, the power module also includes a power switch; the main power supply and the backup power supply are fixed inside the chassis and electrically connected to the motherboard; the power switch is fixed on the back of the chassis and electrically connected to the motherboard.

[0014] As a further improvement of this utility model, the power switching circuit is integrated into an independent power control board. The power control board is fixed inside the chassis near the main power supply and the backup power supply, and is electrically connected to the main power supply output terminal, the backup power supply output terminal and the power interface of the motherboard through wires.

[0015] As a further improvement of this utility model, a hard drive insertion port is provided on the back of the chassis, and the hard drive enclosure mounting bracket is disposed inside the chassis corresponding to the hard drive insertion port. A plug-in cavity communicating with the hard drive insertion port is formed inside the hard drive enclosure mounting bracket. The hard drive is installed in the hard drive pull-out box, and the hard drive pull-out box can be hot-swapped into the plug-in cavity. The hard drive is electrically connected to the motherboard through the hard drive power supply and data cable in the plug-in cavity.

[0016] As a further improvement of this utility model, the two side walls of the hard disk enclosure fixing frame are provided with irregularly shaped locking holes at intervals along the pulling direction of the hard disk pull-out box. The irregularly shaped locking holes are formed by a transitional connection between a large-diameter end near the hard disk insertion port and a small-diameter end away from the hard disk insertion port.

[0017] Locking posts are provided on both sides of the hard drive pull-out box corresponding to the positions of the irregular locking holes. When the hard drive pull-out box is inserted into the hard drive enclosure fixing frame, the locking posts on both sides first enter the large diameter end of the irregular locking hole on the corresponding side. As the hard drive pull-out box is pushed forward, the locking posts on both sides slide to the small diameter end of the irregular locking hole on the corresponding side, so as to lock the hard drive pull-out box in the hard drive enclosure fixing frame.

[0018] As a further improvement of this utility model, the number of RJ45 electrical ports is 6, and the number of SFP optical ports is 2; all the RJ45 electrical ports and the SFP optical ports are arranged linearly on the front of the chassis, and both the RJ45 electrical ports and the SFP optical ports are provided with metal shielding covers.

[0019] As a further improvement of this utility model, it also includes an LED screen; the LED screen is installed on the front of the chassis and connected to the LED screen control board through an LED screen connection cable, the LED screen control board is installed inside the chassis, and the LED screen control board is electrically connected to the motherboard through a serial port connection cable.

[0020] As a further improvement of this utility model, it also includes a network card assembly, which includes a network card adapter board, a network card, a network card pull-out box, and a network card pull-out box fixing frame;

[0021] The front of the chassis is provided with a network card insertion port. The network card pull-out box fixing bracket is disposed inside the chassis corresponding to the network card insertion port. A plug-in cavity communicating with the network card insertion port is formed in the network card pull-out box fixing bracket. The network card is installed in the network card pull-out box. The network card pull-out box is hot-swappable in the plug-in cavity. The network card is electrically connected to the motherboard through the network card adapter board in the plug-in cavity.

[0022] As a further improvement of this utility model, it also includes a heat dissipation component, which includes a chassis fan and a fan connection cable; the chassis fan is fixed to the back of the chassis and is electrically connected to the motherboard through the fan connection cable;

[0023] The chassis also has several ventilation holes around its perimeter for heat dissipation.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] This utility model optimizes the design of the network port module, integrating at least four RJ45 electrical ports and at least one SFP optical port, which can be expanded to a 6 electrical and 2 optical configuration. It directly adapts to multi-link hybrid networking scenarios without the need for external conversion equipment. At the same time, it is equipped with a metal shield to reduce signal crosstalk, which reduces deployment costs and failure points, while ensuring data transmission stability.

[0026] This invention improves reliability through a dual BIOS and multi-power redundancy design: the main and backup BIOS chips on the motherboard, together with the chip switching circuit, can seamlessly switch to the backup chip when the main BIOS fails, avoiding long-term downtime; the main and backup power supplies support AC, DC, and open-circuit power input, and with the switching logic of the independent power control board, can quickly switch to the backup power supply when the main power supply is abnormal, meeting the needs of high business continuity scenarios.

[0027] This utility model optimizes maintenance efficiency through a hot-swappable hard drive structure: the hard drive is placed in a pull-out box and can be directly plugged into the hard drive enclosure mounting bracket. With the quick-locking design of the irregularly shaped locking holes and locking pins, maintenance or expansion does not require disassembly, greatly reducing the time required. At the same time, the LED screen on the front of the chassis displays the device status in real time, allowing maintenance personnel to quickly identify anomalies without logging into the backend, thus reducing maintenance costs. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the chassis cover opening structure of a modular security gateway with a multi-redundancy mechanism disclosed in one embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the chassis cover closing structure of a modular security gateway with a multi-redundancy mechanism disclosed in one embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the electrical connections of a modular security gateway with a multi-redundancy mechanism disclosed in one embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the hard drive enclosure mounting bracket of a modular security gateway with a multi-redundancy mechanism disclosed in one embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of a hard drive pull-out enclosure, a hard drive enclosure mounting bracket, and a hard drive assembly for a modular security gateway with a multi-redundancy mechanism disclosed in one embodiment of this utility model.

[0033] In the picture:

[0034] 1. Chassis top cover; 2. Chassis body; 3. Power supply; 4. Power connection cable; 5. Power switch; 6. Power switch connection cable; 7. Chassis fan; 8. Fan connection cable; 9. Hard drive pull-out enclosure; 9-1. Locking post; 10. Hard drive enclosure mounting bracket; 10-1. Side panel; 10-2. Back panel; 10-3. Bottom panel; 10-4. Irregularly shaped lock hole; 10-5. Hard drive interface; 11. Hard drive power and data cables; 12. Serial port connection cable; 13. LED screen control board; 14. LED screen connection cable; 15. LED screen; 16. Light board; 17. Light board connection cable; 18. Motherboard; 19. Memory; 20. Hard drive; 21. Network card adapter board; 22. Network card; 23. Network card pull-out enclosure; 24. Network card pull-out enclosure mounting bracket; 25. Ventilation holes; 26. Bolts. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] The present invention will now be described in further detail with reference to the accompanying drawings:

[0039] like Figure 1-3As shown, a modular security gateway with a multi-redundancy mechanism according to this utility model includes a chassis, a motherboard 18 disposed inside the chassis, and a power module, a hard drive module, and a network port module electrically connected to the motherboard 18. The motherboard has a main BIOS chip, a backup BIOS chip, and a chip switching circuit. The chip switching circuit is electrically connected to both the main BIOS chip and the backup BIOS chip, and is used to switch between the main BIOS chip and the backup BIOS chip. The power module includes a main power supply, a backup power supply, and a power switching circuit. Both the main power supply and the backup power supply support AC power, DC power, and open-circuit power supply. The power switching circuit is used to switch between the main power supply and the backup power supply. The hard drive module includes a pull-out hard drive enclosure 9 and a hard drive enclosure mounting bracket 10 fixed inside the chassis. The hard drive 20 is placed inside the pull-out hard drive enclosure 9, which is hot-swappable and electrically connected to the hard drive enclosure mounting bracket 10. The network port module is integrated on the motherboard 18 and includes at least four RJ45 electrical ports and at least one SFP optical port.

[0040] Specifically:

[0041] like Figure 1-3 As shown, in the above embodiment, preferably, the chassis adopts a 19-inch rack-mount metal shell, which consists of a chassis body 2 and a chassis cover 1 that can be detachably installed on top of the chassis body 2, and an installation chamber is formed inside the chassis body 2.

[0042] In the above embodiments, preferably, the power module further includes a power switch 5; the power supply 3, consisting of the main power supply and the backup power supply, is fixed inside the chassis and electrically connected to the motherboard 18 via a power connection cable 4; the power switch 5 is fixed on the back of the chassis and electrically connected to the motherboard 18 via a power switch connection cable 6.

[0043] In the above embodiments, preferably, the power switching circuit is integrated into an independent power control board. The power control board is fixed inside the chassis 2 near the main power supply and the backup power supply, and is electrically connected to the output terminals of the main power supply, the backup power supply, and the power interface of the motherboard 18 via wires. In this embodiment, the power switching circuit controls the dual-power dual-active state, which can achieve seamless power supply from the other power supply after one power supply loses power.

[0044] In the above embodiment, preferably, there are 6 RJ45 electrical ports, each with a maximum transmission rate of 1000 Mbps (gigabit), while also being compatible with lower speed modes of 10 Mbps (ten megabits) and 100 Mbps (hundred megabits). There are 2 SFP optical ports. All RJ45 electrical ports and SFP optical ports are linearly arranged on the front of the chassis, and both RJ45 electrical ports and SFP optical ports are equipped with metal shielding covers to reduce signal crosstalk and improve data transmission stability. In this embodiment, SFP optical ports are suitable for long-distance, high-speed data transmission and are commonly used to connect backbone networks or long-distance equipment; RJ45 electrical ports can flexibly connect to local equipment.

[0045] In the above embodiment, preferably, the motherboard 18 is also provided with a memory module slot, in which a memory module 19 is inserted.

[0046] like Figure 4-5 As shown, in the above embodiment, preferably, a hard drive insertion port is provided on the back of the chassis, and the hard drive enclosure mounting bracket 10 is set inside the chassis corresponding to the hard drive insertion port. A plug-in cavity communicating with the hard drive insertion port is formed inside the hard drive enclosure mounting bracket 10. The hard drive 20 is installed in the hard drive pull-out box 9, and the hard drive pull-out box 9 can be hot-swapped into the plug-in cavity. The hard drive 20 is electrically connected to the motherboard 18 through the hard drive interface 10-5 in the plug-in cavity and through the hard drive power supply data cable 11.

[0047] In the above embodiment, preferably, the two side walls of the hard disk enclosure mounting bracket 10 are provided with irregularly shaped locking holes 10-4 at intervals along the pulling direction of the hard disk pull-out box 9. The irregularly shaped locking holes 10-4 are formed by a transitional connection between a large-diameter end near the hard disk insertion port and a small-diameter end away from the hard disk insertion port. Locking pins 9-1 are provided on both sides of the hard disk pull-out box 9 at the positions corresponding to the irregularly shaped locking holes 10-4. In actual use, when the hard disk pull-out box 9 is inserted into the hard disk enclosure mounting bracket 10, the locking pins 9-1 on both sides first enter the large-diameter end of the corresponding irregularly shaped locking hole 10-4. As the hard disk pull-out box 9 is pushed forward, the locking pins 9-1 on both sides slide to the small-diameter end of the corresponding irregularly shaped locking hole 10-4 to lock the hard disk pull-out box 9 in the hard disk enclosure mounting bracket 10.

[0048] In the above embodiment, preferably, the hard drive enclosure mounting bracket 10 includes two L-shaped side plates 10-1 extending along the pulling direction on both sides of the hard drive pull-out box 9, and an L-shaped back plate 10-2 away from the hard drive insertion port. Irregularly shaped locking holes 10-4 are provided on the two side plates 10-1, and a hard drive interface 10-5 is provided on the back plate 10-2. The hard drive pull-out box 9 has a through hole corresponding to the hard drive interface 10-5. The hard drive 20 placed inside the hard drive pull-out box 9 is inserted into the hard drive interface 10-5 through this through hole. The hard drive interface 10-5 is electrically connected to the motherboard 18 via a hard drive power supply data cable 11. A bottom plate 10-3 is also provided at the bottom between the two side plates 10-1. This bottom plate 10-3 constitutes a sliding surface for hot-plugging the hard drive pull-out box 9 within the hard drive enclosure mounting bracket 10.

[0049] In the above embodiments, preferably, the hard drive pull-out enclosure 9 supports 1-2 2.5 / 3.5-inch hard drives 20.

[0050] In the above embodiments, preferably, the number of single-sided irregular-shaped lock holes 10-4 and lock pins 9-1 can be multiple. When multiple lock holes 10-4 and lock pins 9-1 are provided, they are spaced apart on both sides of the hard disk enclosure fixing frame 10 and the hard disk pull-out box 9 along the pull-out direction.

[0051] In the above embodiment, preferably, it further includes an LED screen 15, a light board 16, a network card assembly, and a heat dissipation assembly. The LED screen 15 is mounted on the front of the chassis and connected to an LED screen control board 13 via an LED screen connection cable 14. The LED screen control board 13 is mounted inside the chassis and electrically connected to the motherboard 18 via a serial port connection cable 12. The LED screen 15 is used to display the current chassis temperature, current power mode (main power / backup power), current chip mode (main BIOS chip / backup BIOS chip), and network port status (on / off / speed). In this embodiment, a temperature acquisition unit is integrated on the motherboard 18 to meet the chassis temperature detection requirements.

[0052] In the above embodiment, preferably, the light board 16 is installed on the front of the chassis corresponding to the position of the LED screen 15. The light board 16 has an embedding hole in the middle for embedding the LED screen 15. The light board 16 is electrically connected to the motherboard 18 through the light board connection line 17. The setting of the light board 16 can increase the aesthetics of the security gateway on the one hand, and can also fix the LED screen 15 on the other hand.

[0053] In the above embodiments, preferably, the network card assembly includes a network card adapter board 21, a network card 22, a network card pull-out box 23, and a network card pull-out box fixing bracket 24; wherein, a network card insertion port is provided on the front of the chassis, the network card pull-out box fixing bracket 24 is disposed inside the chassis corresponding to the network card insertion port, and a plug-in cavity communicating with the network card insertion port is formed inside the network card pull-out box 24; the network card 22 is installed in the network card pull-out box 23, the network card pull-out box 23 is hot-swappable in the plug-in cavity, and the network card 22 is electrically connected to the motherboard 18 through the plug interface in the plug-in cavity and the network card adapter board 21.

[0054] In the above embodiments, preferably, the network card pull-out box fixing bracket 24 and the hard disk enclosure fixing bracket 10 have the same structure, which will not be described in detail here.

[0055] In the above embodiments, preferably, the front and back of the chassis are respectively provided with baffles corresponding to the network card insertion port and the hard disk insertion port. The two ends of the baffles are respectively fixed to the chassis by bolts 26 to block the network card insertion port and the hard disk insertion port.

[0056] In the above embodiments, preferably, the heat dissipation assembly includes a chassis fan 7 and a fan connection cable 8; the chassis fan 7 is fixed to the back of the chassis and electrically connected to the motherboard 18 via the fan connection cable 8; a plurality of heat dissipation holes 25 are also formed around the chassis for heat dissipation. In this embodiment, a plurality of sets of heat dissipation holes 25 are respectively arranged on the side panels, front panel and back panel of the chassis.

[0057] Advantages of this utility model:

[0058] This utility model optimizes the design of the network port module, integrating at least four RJ45 electrical ports and at least one SFP optical port, which can be expanded to a 6 electrical and 2 optical configuration. It directly adapts to multi-link hybrid networking scenarios without the need for external conversion equipment. At the same time, it is equipped with a metal shield to reduce signal crosstalk, which reduces deployment costs and failure points, while ensuring data transmission stability.

[0059] This invention improves reliability through a dual BIOS and multi-power redundancy design: the main and backup BIOS chips on the motherboard 18, together with the chip switching circuit, can seamlessly switch to the backup chip when the main BIOS fails, avoiding long-term downtime; the main and backup power supplies support AC, DC, and open-circuit power input, and with the switching logic of the independent power control board, can quickly switch to the backup power supply when the main power supply is abnormal, meeting the needs of high business continuity scenarios.

[0060] This utility model optimizes maintenance efficiency through a hot-swappable hard drive structure: the hard drive 20 is placed inside the hard drive pull-out box 9 and can be directly plugged into the hard drive box mounting bracket 10. With the quick-locking design of the irregular locking hole 10-4 and locking post 9-1, maintenance or expansion does not require disassembly, greatly reducing the time required. At the same time, the LED screen 15 on the front of the chassis displays the device status in real time, allowing maintenance personnel to quickly identify anomalies without logging into the backend, thus reducing maintenance costs.

[0061] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-redundancy mechanism modular security gateway, characterized by, It includes a chassis, a motherboard disposed inside the chassis, and a power module, a hard disk module and a network port module electrically connected to the motherboard; The motherboard is provided with a main BIOS chip, a backup BIOS chip and a chip switching circuit. The chip switching circuit is electrically connected to the main BIOS chip and the backup BIOS chip respectively, and is used to switch between the main BIOS chip and the backup BIOS chip. The power module includes a main power supply, a backup power supply, and a power switching circuit. Both the main power supply and the backup power supply support the input of any power source, such as AC power, DC power, or open-circuit power. The power switching circuit is used to switch between the main power supply and the backup power supply. The hard drive module includes a hard drive pull-out box and a hard drive enclosure mounting bracket fixed inside the chassis. The hard drive is placed inside the hard drive pull-out box, which is hot-swappable to the hard drive enclosure mounting bracket, and the hard drive inside is electrically connected to the motherboard. The network port module is integrated on the motherboard and includes at least four RJ45 electrical ports and at least one SFP optical port.

2. The multi-redundancy mechanism modular security gateway of claim 1, wherein, The power module also includes a power switch; the main power supply and the backup power supply are fixed inside the chassis and electrically connected to the motherboard; the power switch is fixed on the back of the chassis and electrically connected to the motherboard.

3. The multi-redundancy mechanism modular security gateway of claim 1, wherein, The power switching circuit is integrated into an independent power control board, which is fixed inside the chassis near the main power supply and the backup power supply, and is electrically connected to the main power supply output terminal, the backup power supply output terminal and the power interface of the motherboard through wires.

4. The multi-redundancy mechanism modular security gateway of claim 1, wherein, The chassis has a hard drive insertion port on the back, and the hard drive enclosure mounting bracket is located inside the chassis corresponding to the hard drive insertion port. The hard drive enclosure mounting bracket forms a plug-in cavity that communicates with the hard drive insertion port. The hard drive is installed in the hard drive pull-out box, which can be hot-swapped into the plug-in cavity. The hard drive is electrically connected to the motherboard through the hard drive power supply and data cable in the plug-in cavity.

5. The multi-redundancy mechanism modular security gateway of claim 4, wherein, The two side walls of the hard drive enclosure mounting bracket are provided with irregularly shaped locking holes at intervals along the pulling direction of the hard drive pull-out box. The irregularly shaped locking holes are formed by a transitional connection between a large-diameter end near the hard drive insertion port and a small-diameter end away from the hard drive insertion port. Locking posts are provided on both sides of the hard drive pull-out box corresponding to the positions of the irregular locking holes. When the hard drive pull-out box is inserted into the hard drive enclosure fixing frame, the locking posts on both sides first enter the large diameter end of the irregular locking hole on the corresponding side. As the hard drive pull-out box is pushed forward, the locking posts on both sides slide to the small diameter end of the irregular locking hole on the corresponding side, so as to lock the hard drive pull-out box in the hard drive enclosure fixing frame.

6. The modular security gateway with multi-redundancy mechanism according to claim 1, characterized in that, The chassis has 6 RJ45 electrical ports and 2 SFP optical ports. All RJ45 electrical ports and SFP optical ports are arranged linearly on the front of the chassis, and each RJ45 electrical port and SFP optical port is equipped with a metal shield.

7. The modular security gateway with multi-redundancy mechanism according to claim 1, characterized in that, It also includes an LED screen; the LED screen is installed on the front of the chassis and connected to the LED screen control board via an LED screen connection cable. The LED screen control board is installed inside the chassis and is electrically connected to the motherboard via a serial port connection cable.

8. The modular security gateway with multi-redundancy mechanism according to claim 1, characterized in that, It also includes a network card assembly, which includes a network card adapter board, a network card, a network card pull-out box, and a network card pull-out box mounting bracket; The front of the chassis is provided with a network card insertion port, and the network card pull-out box fixing bracket is set inside the chassis corresponding to the network card insertion port. A plug-in cavity communicating with the network card insertion port is formed inside the network card pull-out box fixing bracket. The network card is installed in the network card pull-out box, which is hot-swappable in the plug-in cavity. The network card is electrically connected to the motherboard through the network card adapter board in the plug-in cavity.

9. The modular security gateway with multi-redundancy mechanism according to claim 1, characterized in that, It also includes a heat dissipation component, which includes a chassis fan and a fan cable; the chassis fan is fixed to the back of the chassis and is electrically connected to the motherboard via the fan cable; The chassis also has several ventilation holes around its perimeter for heat dissipation.

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