A remote multi-network integration maintenance and management method based on the combination of NAT and L2TP technologies

Abstract

The present invention discloses a remote multi-network fusion maintenance and management method based on the combination of NAT and L2TP technologies, including: determining the NAT mapping relationship between the private IP addresses and public IP addresses of each service private network; synchronizing the encrypted data transmission within the L2TP tunnel and the data isolation of each service private network; when a request from a remote terminal is received, mapping the request to the corresponding service private network in real time, monitoring the request traffic and the data transmission status between each service private network, and dynamically adjusting the NAT and L2TP tunnel policies; recording remote access logs, and verifying the terminal permissions according to the access control list (ACL) to restrict unauthorized access; when receiving a remote maintenance instruction, parsing and executing system maintenance operations, generating a maintenance status report after completion and feeding back the maintenance logs to the management platform; through the synchronous application of NAT and L2TP technologies, the present invention ensures that the data has both encryption protection and data isolation of each service private network during the transmission process.

Description

Technical Field

[0001] This application relates to the field of network security, and specifically to a remote multi-network fusion maintenance management method, system, electronic device, and storage medium based on the combination of NAT and L2TP technologies. Background Art

[0002] In the wide application of information systems, enterprises, institutions, and government functional departments often need to maintain multiple independent business private networks. These private networks usually use different network operators or physically isolated network environments to ensure the security and independence of their respective business data. However, with the increasing complexity of business and the continuous improvement of management requirements, the challenges faced in maintaining multiple business private networks have become more prominent. Traditional multi-network maintenance methods require operation and maintenance personnel to manage each business private network separately, which is not only inefficient but also increases hardware costs and maintenance difficulties, making it difficult to meet the requirements of efficient and secure maintenance.

[0003] NAT (Network Address Translation) technology, as an effective means to solve the shortage of IP addresses and hide the internal network structure, is widely used in network environments. By mapping private IP addresses to IP addresses that can be recognized in the public network, NAT technology realizes address conversion and data isolation for the internal network. However, the limitation of NAT technology is that when remote maintenance of multiple private networks is required, it cannot ensure the encryption and security of data transmission, and the management and adjustment of NAT rules become cumbersome and difficult to dynamically respond to in the face of complex network environments.

[0004] On the other hand, L2TP (Layer 2 Tunneling Protocol) is a technology used to establish encrypted data channels, which can effectively guarantee the security and integrity during data transmission. The L2TP tunnel encrypts data to ensure the confidentiality and anti-interference ability of data during transmission, and is suitable for remote maintenance and access. However, when encapsulating data packets, L2TP often encapsulates the data in the tunnel, resulting in NAT being unable to recognize the internal information of the data packets, and thus unable to correctly perform the mapping of private IP addresses to public IP addresses.

[0005] Therefore, there is a contradiction in the synchronous application of NAT and L2TP technologies: that is, NAT needs to perform address conversion on data streams, while the encrypted data packets in the L2TP tunnel make it difficult for NAT to recognize and process, resulting in the inability to achieve the correct mapping and secure transmission of private IP and public IP. Based on this, existing multi-network maintenance solutions often need to compromise between data security and maintenance efficiency, and cannot achieve efficient, secure, and multi-network fusion maintenance management with data isolation. Summary of the Invention

[0006] This embodiment provides a remote multi-network fusion maintenance management method, system, electronic device and storage medium based on the combination of NAT and L2TP technologies, exploring how to solve the problem in the background technology that existing multi-network maintenance solutions often need to compromise between data security and maintenance efficiency and cannot achieve efficient, secure, and data-isolated multi-network fusion maintenance management.

[0007] In a first aspect, the present invention provides a remote multi-network fusion maintenance management method based on the combination of NAT and L2TP technologies, including:

[0008] Determine the NAT mapping relationship between the private IP addresses and public IP addresses of each business private network;

[0009] Dynamically adjust the NAT mapping relationship, establish an L2TP tunnel and allocate secure access permissions to remote terminals to synchronize the encrypted data transmission within the L2TP tunnel and the data isolation of each business private network;

[0010] When a request from a remote terminal is received, map the request to the corresponding business private network in real time, monitor the request traffic and the data transmission status between each business private network, and dynamically adjust the NAT and L2TP tunnel policies;

[0011] Record the remote access logs, and verify the terminal permissions according to the access control list (ACL) to restrict unauthorized access;

[0012] When a remote maintenance instruction is received, parse and execute the system maintenance operation, generate a maintenance status report after completion, and feedback the maintenance logs to the management platform.

[0013] In some of these embodiments, determining the NAT mapping relationship between the private IP addresses and public IP addresses of each business private network includes:

[0014] S1-1. Obtain the private IP addresses of each business private network;

[0015] S1-2. Initialize the network topology structure according to the obtained private IP addresses, and configure address parameters for the network topology structure according to the private IP addresses;

[0016] S1-3. Execute NAT rule configuration on the initialized network topology structure to determine the mapping of the private IP addresses;

[0017] The expression for the mapping of the private IP addresses is:

[0018]

[0019] Where IP p represents the set of private IP addresses of each business private network, and IP uRepresents the corresponding set of public IP addresses, Represents the NAT mapping function, which characterizes mapping each private IP address to the corresponding public IP address, Represents the i-th private IP address, Represents the i-th public IP address, the total number of private IP addresses.

[0020] In some of these embodiments, the NAT mapping relationship is dynamically adjusted, an L2TP tunnel is established, and secure access permissions are assigned to remote terminals to synchronize the encrypted data transmission within the L2TP tunnel and the data isolation of each service private network, including:

[0021] S2-1. Monitor network data traffic in real time. When the network data traffic is abnormal, perform dynamic mapping adjustment on the IP addresses in transmission according to the configured NAT rules.

[0022] The expression for the dynamic mapping adjustment is:

[0023] Among them, Ψ t (IP) represents the dynamic mapping relationship of the IP address in transmission at time t, IP represents the current IP address in transmission, λ t Represents the network data traffic monitored at the current time t, λ T Represents the preset data traffic threshold, Represents the NAT mapping rule after dynamic adjustment;

[0024] S2-2. After all dynamic mapping adjustments are completed, configure the L2TP tunnel parameters; after the L2TP tunnel parameters are configured, establish an L2TP tunnel, and assign secure access permissions to remote terminals for the L2TP tunnel;

[0025] S2-3. Perform encrypted data transmission through the configured L2TP tunnel, and apply NAT rules to isolate each service private network;

[0026] The expression for the NAT rules to isolate each service private network is:

[0027]

[0028] Among them, Represents the transmission IP address in the s-th service private network, The public network mapped IP address in the s-th service private network, S represents the set of service private networks, s≠t represents different service private networks.

[0029] In some of these embodiments, when a request to access a remote terminal is received, the request is mapped to the corresponding business private network in real time, the data transmission status between the request traffic and each business private network is monitored, and the NAT and L2TP tunnel policies are dynamically adjusted, including:

[0030] S3-1. When a request to access a remote terminal is received, map the request to the corresponding business private network according to the established NAT rules and L2TP mapping relationships;

[0031] S3-2. Monitor the data isolation status between each private network in real time, and dynamically adjust the NAT and L2TP tunnel policies according to network traffic and access requests.

[0032] In some of these embodiments, remote access logs are recorded, and the terminal permissions are verified according to the access control list (ACL) to restrict unauthorized access, including:

[0033] S4-1. Record the detailed log information of all remote accesses, including access time, terminal identification, and business private network information;

[0034] S4-2. Verify the permissions of all access terminals according to the access control list (ACL) to restrict the access of unauthorized terminals.

[0035] In some of these embodiments, when a remote maintenance instruction is received, parse and execute the system maintenance operation, generate a maintenance status report after completion, and feedback the maintenance log to the management platform, including:

[0036] S5-1. When a remote maintenance instruction is received, parse the instruction content and automatically execute the status update, configuration modification, or maintenance operation of the private network system;

[0037] S5-2. After the maintenance operation is completed, generate a maintenance status report, feedback the maintenance result to the management platform, and store the maintenance log.

[0038] Compared with the prior art, a remote multi-network fusion maintenance management method based on the combination of NAT and L2TP technologies according to the present invention, through the synchronous application of NAT and L2TP technologies, in the data transmission process, first map the private IP address through NAT, and then use L2TP to build an encrypted tunnel to encapsulate and transmit the mapped data. By dynamically adjusting the NAT mapping rules and L2TP tunnel policies, the perfect fusion of the two technologies is achieved, ensuring that the data has both encryption protection and data isolation of each business private network during the transmission process.

[0039] In a second aspect, the present invention provides a remote multi-network fusion maintenance management system based on the combination of NAT and L2TP technologies, including:

[0040] A mapping unit for determining the NAT mapping relationship between the private IP addresses and the public IP addresses of each business private network;

[0041] An encryption isolation dual - function unit for dynamically adjusting the NAT mapping relationship, establishing an L2TP tunnel and allocating secure access permissions to remote terminals to synchronize the encrypted data transmission within the L2TP tunnel and the data isolation of each business private network;

[0042] An adjustment unit for, when a request to access a remote terminal is received, mapping the request to the corresponding business private network in real - time, monitoring the request traffic and the data transmission status between each business private network, and dynamically adjusting the NAT and L2TP tunnel policies;

[0043] A recording unit for recording remote access logs and verifying terminal permissions according to an access control list (ACL) to restrict unauthorized access;

[0044] A maintenance unit for, when receiving a remote maintenance instruction, parsing and executing system maintenance operations, generating a maintenance status report after completion and feeding back the maintenance log to the management platform.

[0045] In a third aspect, the present invention provides an electronic device, the electronic device includes a memory and a processor, the memory stores at least one computer - executable instruction, the processor is configured to run the computer - executable instruction, and when the computer - executable instruction is run by the processor, it is used to implement a remote multi - network fusion maintenance management method based on the combination of NAT and L2TP technologies described in the first aspect.

[0046] In a fourth aspect, the present invention provides a computer - readable storage medium, on which a computer program is stored, and when the computer program is run by a processor, it implements a remote multi - network fusion maintenance management method based on the combination of NAT and L2TP technologies described in the first aspect.

[0047] Compared with the prior art, the beneficial effects of the remote multi - network fusion maintenance management system, electronic device and storage medium based on the combination of NAT and L2TP technologies of the present invention are the same as those of a remote multi - network fusion maintenance management method based on the combination of NAT and L2TP technologies described above, so they will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a step schematic diagram of a remote multi - network fusion maintenance management method based on the combination of NAT and L2TP technologies provided by the embodiments of the present invention;

[0049] Figure 2 It is a structural block diagram of remote multi - network fusion maintenance management based on the combination of NAT and L2TP technologies provided by the embodiments of the present invention;

[0050] Figure 3 This is the network topology diagram in the embodiments provided by the present invention;

[0051] Figure 4 This is a diagram of an electronic device in the embodiments provided by the present invention; Detailed implementation manners

[0052] To more clearly understand the purpose, technical solution and advantages of the present application, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments.

[0053] Unless otherwise defined, the technical terms or scientific terms involved in the present application shall have the general meanings understood by those with ordinary skills in the technical field to which the present application belongs. In the present application, words such as "a", "one", "kind", "the", "these" and the like do not indicate a limitation in quantity, and they can be singular or plural. The terms "including", "comprising", "having" and any variants thereof involved in the present application are intended to cover non-exclusive inclusion; for example, a process, method, system, product or device including a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent in these processes, methods, products or devices. The terms "connected", "coupled" and the like involved in the present application do not limit to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" involved in the present application refers to two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships may exist. For example, "A and / or B" may represent: A exists alone, A and B exist simultaneously, and B exists alone. Usually, the character " / " indicates that the objects associated before and after are in an "or" relationship. The terms "first", "second", "third" and the like involved in the present application are only used to distinguish similar objects and do not represent a specific order for the objects.

[0054] First, the prior art and related concepts involved in the embodiments of the present invention are described:

[0055] NAT: Network Address Translation, which is a network technology used to convert between private IP addresses within a network and public IP addresses on the external network. It is implemented on network devices such as routers or firewalls, allowing multiple devices to communicate with the external network (such as the Internet) using one or a small number of public IP addresses. When an internal network device (with a private IP address) needs to access the external network, NAT will convert the device's private IP address into a public IP address available for Internet communication. When data is returned, the NAT device will convert the destination address of the data packet back to the private IP address and pass it to the internal device to achieve two-way communication.

[0056] L2TP: Layer 2 Tunneling Protocol, which is a tunneling protocol used to create a virtual "tunnel" through a public network (such as the Internet) to transmit data. L2TP operates at the second layer (data link layer) of the OSI model and can encapsulate PPP (Point-to-Point Protocol) frames and transmit them through the tunnel. Data is encapsulated by the L2TP protocol at the source end, enters the tunnel for transmission, and is decapsulated at the destination end to restore the original data.

[0057] Reference Figures 1 to 4 , in the embodiments of the present invention, a remote multi-network fusion maintenance and management method based on the combination of NAT and L2TP technologies is provided.

[0058] Figure 1 is a flowchart of a remote multi-network fusion maintenance and management method based on the combination of NAT and L2TP technologies of the present invention. Figure 3 The network topology diagram in the present invention;

[0059] Figure 1 The processes in it include:

[0060] Step S1: Determine the NAT mapping relationship between the private IP addresses and public IP addresses of each service private network.

[0061] Step S1 specifically includes:

[0062] S1-1: Obtain the private IP addresses of each service private network;

[0063] Specifically, reference can be made to Figure 3 , this management method first communicates with each service private network to collect all the private IP addresses used within each service private network, so as to comprehensively understand the IP address distribution of each service private network, and then can accurately provide basic data for subsequent configuration and management. Accurately obtaining the private IP addresses ensures a complete understanding of the network structure of each service private network.

[0064] Exemplarily, in a video surveillance system, obtaining the private IP address of each monitoring center or camera private network is the basis for realizing remote management of monitoring devices. This process ensures that operation and maintenance personnel can accurately master the network distribution of each monitoring device and provides support for subsequent maintenance work.

[0065] S1-2. Initialize the network topology structure according to the obtained private IP address, and configure address parameters for the network topology structure according to the private IP address;

[0066] Specifically, after obtaining the private IP address information of each business private network, start analyzing the private IP address and constructing the topology structure of the entire network. Based on each private IP address, combined with the connection method and data flow direction between business private networks, a complete network topology diagram is dynamically generated to present the internal connection relationship of each business private network and the architecture in the overall network.

[0067] After the topology structure is generated, continue to configure detailed address parameters for the network topology structure according to the characteristics of the private IP address, including subnet mask, gateway address, and related address range and other information. This step ensures the accurate identification of each node in the network and lays a foundation for subsequent data transmission and management.

[0068] Exemplarily, in a video surveillance system, in this way, the network location relationship between each monitoring center and camera can be quickly established, the transmission path of monitoring data can be accurately planned, ensuring that data can reach the specified destination smoothly, facilitating subsequent remote management and maintenance.

[0069] S1-3. Execute NAT rule configuration on the initialized network topology structure to determine the mapping of the private IP address;

[0070] The expression of the mapping of the private IP address is:

[0071]

[0072] where, IP p represents the set of private IP addresses of each business private network, IP u represents the corresponding set of public IP addresses, represents the NAT mapping function, which characterizes mapping each private IP address to the corresponding public IP address, represents the i-th private IP address, represents the i-th public IP address, and n is the total number of private IP addresses;

[0073] Suppose a private IP address is 192.168.1.10, then NAT maps this address to 203.0.113.5, ensuring that devices within the private network appear as this public IP when communicating with the outside.

[0074] Specifically, after initializing the network topology, detailed NAT rules are configured for this topology, precisely mapping the private IP addresses of each business private network to the corresponding public IP addresses. Through this configuration, it is ensured that the connection relationship between each private IP address and the network is accurately corresponding, avoiding address conflicts.

[0075] Next, according to the configured rules, the private IP addresses of each business private network are mapped to the corresponding public IP addresses one by one. This process not only ensures that internal data can be correctly transmitted in the public network but also maintains the data independence and security of each business private network, preventing internal network information from being directly exposed in the public network.

[0076] Exemplarily, in a medical information system, the accuracy of NAT rule configuration is directly related to whether the data transmission of each subsystem such as the medical record management system, medical imaging system, and drug management system is correct. Through precise IP address mapping, it can ensure the secure and independent data exchange between each medical system, preventing the leakage of sensitive information.

[0077] This process further includes:

[0078] Step S2, dynamically adjust the NAT mapping relationship, establish an L2TP tunnel, and allocate secure access permissions to remote terminals to synchronize the encrypted data transmission within the L2TP tunnel and the data isolation of each business private network.

[0079] Step S2 specifically includes:

[0080] S2-1, real-time monitor network data traffic. When the network data traffic is abnormal, dynamically map and adjust the IP addresses in transmission according to the configured NAT rules.

[0081] The expression for the dynamic mapping adjustment is:

[0082] where Ψ t (IP) represents the dynamic mapping relationship of the IP address in transmission at time t, IP represents the current IP address in transmission, λ t represents the network data traffic monitored at the current time t, λ T represents the preset data traffic threshold, represents the NAT mapping rule after dynamic adjustment;

[0083] Specifically, after completing the NAT rule configuration, continuously monitor the data traffic in the entire network. Through real-time monitoring, promptly capture any changes in the network to ensure the stability and effectiveness of data transmission. Based on the monitored network data traffic, dynamically adjust the IP addresses in transit according to the previously configured NAT rules.

[0084] When the data traffic changes or an anomaly occurs, immediately remap the IP addresses in transit according to the rules to ensure that the data can continuously follow the preset NAT rules. This dynamic adjustment mechanism enables the network to adapt to the ever-changing data flow environment and guarantees the accuracy of data transmission.

[0085] Exemplarily, in an educational network, when the remote teaching system encounters a sudden increase in data traffic (such as a large-scale online exam or live class), the system can, through real-time monitoring and adjustment of the NAT mapping relationship, ensure the stability of network communication and the accurate transmission of data, preventing network congestion or data transmission errors.

[0086] S2-2. After completing all dynamic mapping adjustments, configure the L2TP tunnel parameters; after configuring the L2TP tunnel parameters, establish the L2TP tunnel and assign secure access permissions to the remote terminals for the L2TP tunnel.

[0087] Specifically, after completing the dynamic mapping adjustments of all NAT rules, start establishing the L2TP tunnel. Initiate the creation process of the L2TP tunnel and configure the tunnel parameters according to the predetermined security policy, including encryption methods, authentication mechanisms, and transmission protocols, etc., to ensure that the tunnel has the necessary security and stability.

[0088] After the tunnel parameters are configured, connect the configured L2TP tunnel to the remote terminals and assign corresponding secure access permissions to each remote terminal to ensure that only authorized terminals can access the business private network through the L2TP tunnel, realizing the secure access management of remote terminals and ensuring the effective protection of data during transmission.

[0089] Exemplarily, in a financial trading system, the establishment of the L2TP tunnel ensures that remote operation and maintenance personnel can securely access the trading system and maintain trading data and system parameters. This encrypted access method ensures the security of the trading system and prevents illegal intrusion or data tampering.

[0090] S2-3. Perform encrypted data transmission through the configured L2TP tunnel and apply NAT rules to isolate each business private network;

[0091] The expression for the NAT rules to isolate each business private network is:

[0092]

[0093] Among them, represents the transmission IP address in the s-th service private network, the public network mapped IP address in the s-th service private network, S represents the set of service private networks, and s≠t represents different service private networks.

[0094] NAT mapping function is used to uniquely map the internal transmission IP address of each service private network to the corresponding public network IP address to ensure IP address mapping isolation for data of different service private networks, so that during the transmission process, the public network IP addresses of any two different service private networks s and t and will not be confused or crossed, ensuring data independence and isolation.

[0095] Specifically, after the L2TP tunnel is successfully established, encrypted data transmission starts through the tunnel to ensure the security of data during the communication process between the remote terminal and the service private network, and prevent data from being eavesdropped, tampered with, or accessed without authorization.

[0096] At the same time, apply the previously configured NAT rules to isolate the data streams from different service private networks, ensuring that data between service private networks will not be confused or cross-transmitted, even if they share the same L2TP tunnel for communication. This isolation mechanism ensures the independence and data security of each service private network.

[0097] Exemplarily, in a video surveillance system, the remote terminal connects to the surveillance center through an encrypted L2TP tunnel, and at the same time uses NAT rules to isolate the surveillance data in different regions, ensuring the security of the transmission of surveillance information and preventing data in different regions from interfering with each other.

[0098] This process further includes:

[0099] Step S3: When receiving a request from a remote terminal, map the request to the corresponding service private network in real time, monitor the request traffic and the data transmission status between each service private network, and dynamically adjust the NAT and L2TP tunnel policies.

[0100] Step S3 specifically includes:

[0101] S3-1: When receiving an access request from a remote terminal, map the request to the corresponding service private network according to the established NAT rules and L2TP mapping relationship.

[0102] Specifically, when a remote terminal issues an access request, the request is first analyzed in detail to identify the source address, destination address, and connection purpose of the request. Then, based on the established NAT rules and L2TP mapping relationships, the request of the remote terminal is accurately mapped to the corresponding business private network, ensuring that each access request can reach the target private network correctly and maintaining the accurate transmission and flow direction of data packets.

[0103] Exemplarily, in an educational network, this step ensures that remote teachers and students can accurately connect to the specified teaching resources or online classrooms through the L2TP tunnel, avoiding misconnection to other teaching networks and achieving precise access to teaching resources.

[0104] S3-2. Monitor the data isolation status between private networks in real time and dynamically adjust the NAT and L2TP tunnel policies according to network traffic and access requests;

[0105] Specifically, continuously monitor the data transmission status between business private networks to ensure that data is strictly isolated between private networks. Through real-time monitoring, timely detect the data transmission status between private networks and quickly identify anomalies in the data isolation status, such as a sudden increase in data transmission volume or abnormal access requests.

[0106] When detecting abnormal network traffic or changes in access requests, immediately dynamically adjust the NAT and L2TP tunnel policies to cope with these changes. Specific adjustments include:

[0107] Adjust NAT rules: If it is detected that the access request volume of a certain private network suddenly increases, or there is abnormal data traffic attempting to cross boundaries and enter other private networks, the system will automatically update the NAT mapping rules. For example:

[0108] Restrict access: Block the IP address segment of abnormal traffic to prevent data in this IP segment from entering other business private networks.

[0109] Update the mapping relationship: Temporarily adjust the mapping relationship of IP addresses to ensure that abnormal traffic does not affect the communication of normal business private networks and maintain data isolation.

[0110] Adjust L2TP tunnel parameters: If a certain remote terminal attempts to access multiple business private networks without authorization, or potential security risks are detected, the system will adjust the access permissions and encryption parameters of the L2TP tunnel. For example:

[0111] Modify access permissions: Temporarily tighten or change the access permissions of the remote terminal to ensure that the terminal can only access authorized business private networks and prevent unauthorized access.

[0112] Adjust the encryption level: For high-risk access requests, the system can temporarily increase the encryption level of the L2TP tunnel to enhance data transmission security and prevent data leakage.

[0113] Adjust the access control policy (ACL): Based on real-time monitored access requests and data traffic changes, the system updates the access control list (ACL) to dynamically adjust the allowed or prohibited access rules. This ensures that only authorized terminal devices and data traffic can enter the specified business private network.

[0114] Through these dynamic adjustments, the system can flexibly adjust the NAT mapping rules and L2TP tunnel policies according to real-time monitored network environment changes, ensuring data isolation, transmission security, and overall system stability, and effectively preventing potential network security risks.

[0115] Exemplarily, in a financial trading system, this monitoring mechanism can promptly adjust the policy to prevent attacks on the trading system by abnormal traffic, ensure the secure and independent data transmission between each business outlet, and avoid the tampering or leakage of trading data due to abnormal traffic.

[0116] This process also includes:

[0117] Step S4: Record the remote access logs and verify the terminal permissions based on the access control list (ACL) to restrict unauthorized access.

[0118] Step S4 specifically includes:

[0119] S4-1: Record the detailed log information of all remote accesses, including access time, terminal identification, and business private network information.

[0120] Specifically, each remote access activity is detailedly recorded, including information such as access time, terminal device identification, and the business private network accessed. By fully tracking each access behavior, a complete access record chain is formed to ensure that each access action is traceable and verifiable.

[0121] Save this log information for subsequent security audits and troubleshooting. Detailed and accurate log records can promptly detect abnormal access behaviors, ensure that the operating status of the entire network can be effectively traced at any time, and provide a reliable reference basis for network security management and maintenance personnel.

[0122] Exemplarily, in practical applications, during the remote maintenance of a video surveillance system, through this logging function, operation and maintenance personnel can track the remote access situation of each monitoring center or camera, and promptly discover and handle potential security issues. In a financial trading system, access log records can help track the operation behaviors of each remote transaction maintenance, ensure that the maintenance process complies with regulatory requirements, and prevent abnormal operations or potential threats.

[0123] S4-2. Verify the permissions of all access terminals according to the access control list (ACL), and restrict the access of unauthorized terminals.

[0124] Specifically, according to the preset access control list (ACL), verify the permissions of all terminals attempting to access, and ensure that only terminal devices meeting the ACL permission requirements can obtain access permissions. By strictly checking parameters such as device identification, user identity, and IP address, verify the legitimacy of the access terminals.

[0125] This strict permission verification process effectively prevents unauthorized terminals from accessing the business private network, avoids potential risks of illegal intrusion and data leakage, ensures that only authorized terminals can access the business private network, and maintains the security of the network and the integrity of the data.

[0126] Exemplarily, for example, in the maintenance of a medical information system, only authorized terminals can access sensitive data such as medical record management and medical images, thereby protecting patient privacy and preventing unauthorized personnel from accessing sensitive information. In the remote maintenance of an educational network, this mechanism can restrict access to the campus network or remote teaching network to only authorized terminals, ensuring data security.

[0127] This process further includes:

[0128] Step S5. When receiving a remote maintenance instruction, parse and execute the system maintenance operation, and after completion, generate a maintenance status report and feedback the maintenance log to the management platform.

[0129] Step S5 specifically includes:

[0130] S5-1. When receiving a remote maintenance instruction, parse the instruction content and automatically execute the status update, configuration modification, or maintenance operation of the private network system.

[0131] Specifically, when receiving a remote maintenance instruction, immediately parse the instruction content in detail, identify the operation requirements and target objects of the instruction. After parsing is completed, automatically execute the status update, configuration modification, or other maintenance operations of the private network system to ensure that the maintenance task can be accurately completed.

[0132] This automated execution process avoids errors caused by manual operations, ensures the accuracy and timeliness of maintenance work, is particularly suitable for remote maintenance of multi-service private networks, and can quickly respond to and execute status adjustments and configuration requirements of each private network system.

[0133] Exemplarily, in a video surveillance system, this function can achieve remote adjustment of camera configurations, monitoring ranges, and parameters, and respond promptly to emergencies; in a financial trading system, the automatically executed maintenance instructions can ensure rapid adjustment and update of the trading private network configuration, ensuring the security and efficient operation of the system.

[0134] S5-2. After completing the maintenance operation, generate a maintenance status report, feedback the maintenance result to the management platform, and store the maintenance log.

[0135] Specifically, after the maintenance operation is completed, a detailed maintenance status report is automatically generated, recording the content, time, and execution result of the maintenance operation, and the report is fed back to the management platform to help managers understand the progress and effect of the maintenance work in a timely manner and ensure the transparency of the maintenance result.

[0136] At the same time, the log information of all maintenance operations is stored completely to ensure that the subsequent system analysis and optimization work can trace the entire maintenance process. This process not only provides important data support for system maintenance and optimization but also ensures the compliance and traceability of the entire maintenance work.

[0137] Exemplarily, in a medical information system, such reports and logs can ensure that every maintenance and update of the medical record system is recorded in detail, meeting the review requirements of regulatory authorities; in the application of an educational network, the maintenance status report can provide clear maintenance records for the school's IT department, ensuring efficient and transparent management of the campus network.

[0138] A remote multi-network fusion maintenance management method based on the combination of NAT and L2TP technologies in this embodiment, through the synchronous application of NAT and L2TP technologies, during data transmission, first map the private IP address through NAT, and then use L2TP to build an encrypted tunnel to encapsulate and transmit the mapped data. By dynamically adjusting the NAT mapping rules and L2TP tunnel policies, the integration of the two technologies is achieved, ensuring that the data has both encryption protection and data isolation of each business private network during transmission. This innovative solution effectively solves the problems of data transmission security and isolation in multi-network fusion and realizes efficient and secure remote multi-network fusion maintenance management.

[0139] At the same time, traditional multi-private network maintenance and management requires operation and maintenance personnel to switch between each business private network, which is time-consuming and labor-intensive. This solution uses NAT technology to map the private IP address of each business private network to an identifiable public IP address to form a unified address mapping relationship. Subsequently, the introduction of L2TP technology provides an encrypted access channel for remote maintenance terminals, allowing operation and maintenance personnel to simultaneously access and maintain multiple business private networks through a unified interface. This not only greatly improves maintenance efficiency, but also realizes concurrent access across private networks, simplifies management processes, and avoids cumbersome operations in previous maintenance management.

[0140] Furthermore, in an environment where multiple business private networks are integrated, data isolation and security are the primary considerations. This embodiment uses NAT technology to ensure that the data flow of each business private network has a unique mapping relationship in the public network, avoiding direct exposure of internal network information to the public network. The L2TP tunnel provides an encrypted channel for data transmission to prevent eavesdropping, tampering or unauthorized access to data during transmission. The combination of the two ensures the data independence between each business private network, prevents data leakage and cross-network interference, and provides strong security for data transmission in a multi-network environment.

[0141] This embodiment combines NAT and L2TP technologies simultaneously to achieve both mapping and isolation of private IP addresses and encryption and security of data transmission, successfully solving the problem that cannot be solved in traditional technologies. This solution not only improves the maintenance efficiency of multi-network integration, but also ensures the security and flexibility of the system, providing an efficient, secure and reliable solution for multi-network maintenance.

[0142] The embodiment of the present invention also provides a remote multi-network fusion maintenance management system based on the combination of NAT and L2TP technology, which is used to implement the above method embodiment, which has been described and will not be repeated. The terms "module", "unit", "subunit" and the like used below can implement a combination of software and / or hardware for a predetermined function. Although the system described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware is also possible and conceivable.

[0143] like Figure 2 As shown, Figure 2 This is a structural block diagram of a remote multi-network fusion maintenance management system based on NAT and L2TP technology. The system includes:

[0144] A mapping unit, used to determine the NAT mapping relationship between the private IP address and the public IP address of each business private network;

[0145] An encryption isolation dual-functional unit is used to dynamically adjust the NAT mapping relationship, establish an L2TP tunnel, and allocate secure access permissions to remote terminals, so as to synchronize the encrypted data transmission within the L2TP tunnel and the data isolation of each service private network;

[0146] An adjustment unit is used to, when a request to access a remote terminal is received, map the request to the corresponding service private network in real time, monitor the data transmission status between the request traffic and each service private network, and dynamically adjust the NAT and L2TP tunnel policies;

[0147] A recording unit is used to record remote access logs, verify terminal permissions according to the access control list (ACL), and restrict unauthorized access;

[0148] A maintenance unit is used to, when receiving a remote maintenance instruction, parse and execute system maintenance operations, generate a maintenance status report after completion, and feedback the maintenance log to the management platform

[0149] In the above system, through the mapping unit, the NAT mapping relationship is determined; through the encryption isolation dual-functional unit, the encrypted data transmission within the L2TP tunnel and the data isolation of each service private network are synchronized; through the adjustment unit, the NAT and L2TP tunnel policies are dynamically adjusted; through the recording unit, unauthorized access is restricted; and through the maintenance unit, the maintenance log is fed back to the management platform, solving the problem that existing multi-network maintenance solutions often need to compromise between data security and maintenance efficiency and cannot achieve efficient, secure, and multi-network integration maintenance management with data isolation.

[0150] As Figure 4 shown, an embodiment of the present invention further provides an electronic device. The electronic device includes a memory 230 and a processor 210. The memory 230 stores at least one computer-executable instruction. The processor 210 is configured to run the computer-executable instruction. When the computer-executable instruction is run by the processor 210, it is used to implement the above-mentioned remote multi-network integration maintenance management method based on the combination of NAT and L2TP technologies.

[0151] The electronic device may include a processor 210, a communication interface 220, a memory 230, and a communication bus 240. Among them, the processor 210, the communication interface 220, and the memory 230 complete mutual communication through the communication bus 240. The processor 210 can call the logical instructions in the memory 230 to execute a remote multi-network integration maintenance management method disclosed in this embodiment based on the combination of NAT and L2TP technologies.

[0152] In addition, when the logical instructions in the above-mentioned memory 230 are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in various embodiments of the present invention. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0153] The system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution in this embodiment. A person of ordinary skill in the art can understand and implement it without creative efforts.

[0154] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or equivalently replace some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of various embodiments of the present invention.

Claims

1. A remote multi-network integration maintenance and management method based on the combination of NAT and L2TP technology, applied to a server, characterized in that: include: Determine the NAT mapping relationship between the private IP address and public IP address of each business dedicated network; Dynamically adjust the NAT mapping relationship, establish an L2TP tunnel and assign security access rights to the remote terminal to synchronize data encryption transmission in the L2TP tunnel and data isolation of each business private network; When a request is received from a remote terminal, the request is mapped to the corresponding business private network in real time, the request traffic and the data transmission status between each business private network are monitored, and the NAT and L2TP tunnel policies are dynamically adjusted; Record remote access logs and verify terminal permissions based on access control lists to restrict unauthorized access; When receiving remote maintenance instructions, parse and execute system maintenance operations, generate maintenance status reports after completion and feed back maintenance logs to the management platform; The NAT mapping relationship is dynamically adjusted to establish an L2TP tunnel and assign security access rights to a remote terminal, so as to synchronize data encryption transmission in the L2TP tunnel and data isolation of each service-specific network, including: S2-1, real-time monitoring of network data traffic, when the network data traffic is abnormal, dynamic mapping adjustment of the IP address in transmission according to the configured NAT rules; The expression of the dynamic mapping adjustment is: Among them, t (IP) represents the dynamic mapping relationship of the IP address in transmission at time t, IP represents the IP address in current transmission, λ t represents the network data traffic monitored at the current time t, λ T Indicates the preset data flow threshold. Indicates the dynamically adjusted NAT mapping rules; S2-2, after completing all dynamic mapping adjustments, configuring L2TP tunnel parameters; after the L2TP tunnel parameters are configured, establishing the L2TP tunnel, and assigning security access rights to the L2TP tunnel for the remote terminal; S2-3, encrypt data transmission through the configured L2TP tunnel, and apply NAT rules to isolate each business private network; The expression for isolating each business private network by the NAT rule is: in, Indicates the transmission IP address in the sth business private network. represents the public network mapped IP address in the s-th business private network, S represents the set of business private networks, and s≠t represents different business private networks; NAT mapping function Used to transfer the internal transmission IP address of each business private network Uniquely mapped to the corresponding public IP address Ensure that the IP addresses of data in different business private networks are mapped and isolated, so that during the transmission process, the public IP addresses of any two different business private networks s and t and There is no confusion or crossover; When a request is received from a remote terminal, the request is mapped to the corresponding business private network in real time, the request traffic and the data transmission status between each business private network are monitored, and the NAT and L2TP tunnel policies are dynamically adjusted, including: S3-1, when receiving the access request from the remote terminal, the request is mapped to the corresponding business private network according to the established NAT rules and L2TP mapping relationship; S3-2, real-time monitoring of data isolation status between private networks, and dynamic adjustment of NAT and L2TP tunnel strategies based on network traffic and access requests; When abnormal network traffic or changes in access requests are detected, the NAT and L2TP tunnel policies are dynamically adjusted immediately to cope with these changes. The specific adjustments include: Adjust NAT rules: If the number of access requests to a private network suddenly increases, or abnormal data traffic attempts to cross the boundary and enter other private networks, the system will automatically update the NAT mapping rules; Restrict access: block the IP address segment with abnormal traffic to prevent the data in this IP segment from entering other business private networks; Update mapping relationship: Temporarily adjust the mapping relationship of IP addresses to ensure that abnormal traffic does not affect the communication of normal business private network and maintain data isolation; Adjust L2TP tunnel parameters: If a remote terminal attempts to access multiple business private networks without authorization, or if a potential security risk is detected, the system will adjust the access rights and encryption parameters of the L2TP tunnel; Modify access rights: temporarily tighten or change the access rights of remote terminals to ensure that the terminal can only access authorized business private networks to prevent unauthorized access; Adjust encryption level: For high-risk access requests, the system can temporarily increase the encryption level of the L2TP tunnel to increase the security of data transmission and prevent data leakage; Adjust access control policies: Based on real-time monitoring of access requests and data traffic changes, the system will update the access control list and dynamically adjust the access rules that are allowed or prohibited.

2. A remote multi-network integration maintenance and management method based on the combination of NAT and L2TP technology according to claim 1, characterized in that: Determine the NAT mapping relationship between the private IP address and the public IP address of each service-specific network, including: S1-1. Obtain the private IP address of each business private network; S1-2, initializing a network topology structure according to the obtained private IP address, and configuring address parameters for the network topology structure according to the private IP address; S1-3, executing NAT rule configuration on the initialized network topology to determine the mapping of private IP addresses; The mapping expression of the private IP address is: Among them, IP p Represents the private IP address set of each business private network, IP u Indicates the corresponding public IP address set. Represents the NAT mapping function, which represents mapping each private IP address to the corresponding public IP address. represents the i-th private IP address, represents the i-th public IP address, and n represents the total number of private IP addresses.

3. The remote multi-network integration maintenance and management method based on the combination of NAT and L2TP technology according to claim 1 is characterized in that: Record remote access logs and verify terminal permissions based on access control lists (ACLs) to limit unauthorized access, including: S4-1. Record detailed log information of all remote access, including access time, terminal identification and business private network information; S4-2. Verify the permissions of all access terminals based on the access control list and restrict unauthorized terminal access.

4. A remote multi-network integration maintenance and management method based on the combination of NAT and L2TP technology according to claim 3, characterized in that: When receiving remote maintenance instructions, the system will parse and execute maintenance operations. After completion, a maintenance status report will be generated and the maintenance log will be fed back to the management platform, including: S5-1, when receiving a remote maintenance instruction, parsing the instruction content, and automatically executing the status update, configuration modification or maintenance operation of the private network system; S5-2. After the maintenance operation is completed, a maintenance status report is generated, the maintenance results are fed back to the management platform, and a maintenance log is stored.

5. A remote multi-network fusion maintenance and management system based on the combination of NAT and L2TP technologies, characterized in that: include: A mapping unit, used to determine the NAT mapping relationship between the private IP address and the public IP address of each business private network; An encryption and isolation dual-function unit, used to dynamically adjust the NAT mapping relationship, establish an L2TP tunnel and assign security access rights to a remote terminal, so as to synchronize data encryption transmission in the L2TP tunnel and data isolation of each service-specific network; The adjustment unit is used to map the request to the corresponding business private network in real time when the remote terminal accesses the request, monitor the request flow and the data transmission status between each business private network, and dynamically adjust the NAT and L2TP tunnel strategies; A recording unit is used to record remote access logs and verify terminal permissions based on access control lists to restrict unauthorized access; The maintenance unit is used to receive remote maintenance instructions, parse and execute system maintenance operations, generate maintenance status reports after completion, and feed back maintenance logs to the management platform; The NAT mapping relationship is dynamically adjusted to establish an L2TP tunnel and assign security access rights to a remote terminal, so as to synchronize data encryption transmission in the L2TP tunnel and data isolation of each service-specific network, including: S2-1, real-time monitoring of network data traffic, when the network data traffic is abnormal, dynamic mapping adjustment of the IP address in transmission according to the configured NAT rules; The expression of the dynamic mapping adjustment is: Among them, t (IP) represents the dynamic mapping relationship of the IP address in transmission at time t, IP represents the IP address in current transmission, λ t represents the network data traffic monitored at the current time t, λ T Indicates the preset data flow threshold. Indicates the dynamically adjusted NAT mapping rules; S2-2, after completing all dynamic mapping adjustments, configuring L2TP tunnel parameters; after the L2TP tunnel parameters are configured, establishing the L2TP tunnel, and assigning security access rights to the L2TP tunnel for the remote terminal; S2-3, encrypt data transmission through the configured L2TP tunnel, and apply NAT rules to isolate each business private network; The expression for isolating each business private network by the NAT rule is: in, Indicates the transmission IP address in the sth business private network. The public network mapped IP address in the s-th business private network, where S represents the set of business private networks, and s≠t represents different business private networks; NAT mapping function Used to transfer the internal transmission IP address of each business private network Uniquely mapped to the corresponding public IP address Ensure that the IP addresses of data in different business private networks are mapped and isolated, so that during the transmission process, the public IP addresses of any two different business private networks s and t and There is no confusion or crossover; When a request is received from a remote terminal, the request is mapped to the corresponding business private network in real time, the request traffic and the data transmission status between each business private network are monitored, and the NAT and L2TP tunnel policies are dynamically adjusted, including: S3-1, when receiving the access request from the remote terminal, the request is mapped to the corresponding business private network according to the established NAT rules and L2TP mapping relationship; S3-2, real-time monitoring of data isolation status between private networks, and dynamic adjustment of NAT and L2TP tunnel strategies based on network traffic and access requests; When abnormal network traffic or changes in access requests are detected, the NAT and L2TP tunnel policies are dynamically adjusted immediately to cope with these changes. The specific adjustments include: Adjust NAT rules: If the number of access requests to a private network suddenly increases, or abnormal data traffic attempts to cross the boundary and enter other private networks, the system will automatically update the NAT mapping rules; Restrict access: block the IP address segment with abnormal traffic to prevent the data in this IP segment from entering other business private networks; Update mapping relationship: Temporarily adjust the mapping relationship of IP addresses to ensure that abnormal traffic does not affect the communication of normal business private network and maintain data isolation; Adjust L2TP tunnel parameters: If a remote terminal attempts to access multiple business private networks without authorization, or if a potential security risk is detected, the system will adjust the access rights and encryption parameters of the L2TP tunnel; Modify access rights: temporarily tighten or change the access rights of remote terminals to ensure that the terminal can only access authorized business private networks to prevent unauthorized access; Adjust encryption level: For high-risk access requests, the system can temporarily increase the encryption level of the L2TP tunnel to increase the security of data transmission and prevent data leakage; Adjust access control policies: Based on real-time monitoring of access requests and data traffic changes, the system will update the access control list and dynamically adjust the access rules that are allowed or prohibited.

6. An electronic device, characterized in that: It includes a memory and a processor, the memory stores at least one computer executable instruction, the processor is configured to run the computer executable instruction, and when the computer executable instruction is run by the processor, a remote multi-network integration maintenance and management method based on the combination of NAT and L2TP technologies as described in any one of claims 1 to 4 is implemented.

7. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by the processor, the remote multi-network integration maintenance and management method based on the combination of NAT and L2TP technologies as described in any one of claims 1 to 4 is implemented.

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