Remote multi-network integration maintenance management method based on combination of NAT and L2TP technologies

Abstract

The invention discloses a remote multi-network integration maintenance management method based on combination of NAT and L2TP technologies. The method comprises the following steps: determining an NAT mapping relationship between a private IP address and a public IP address of each service private network; synchronizing data encryption transmission in the L2TP tunnel and data isolation of each service private network; when a request for accessing a remote terminal is received, the request is mapped to a corresponding service private network in real time, the data transmission state between the request flow and each service private network is monitored, and the NAT and L2TP tunnel strategies are dynamically adjusted; recording a remote access log, verifying the authority of the terminal according to an access control list (ACL), and limiting unauthorized access; when a remote maintenance instruction is received, system maintenance operation is analyzed and executed, a maintenance state report is generated after the system maintenance operation is completed, and a maintenance log is fed back to the management platform; according to the invention, through synchronous application of NAT and L2TP technologies, encryption protection of data in a transmission process is ensured, and data isolation of each service private network can be maintained.

Description

Technical Field

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

[0002] In the widespread application of information systems, enterprises, institutions and government 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 increase in business complexity and the continuous improvement of management requirements, the challenges faced in maintaining multiple business private networks have become more prominent. The traditional multi-network maintenance method requires operation and maintenance personnel to manage each business private network separately, which is not only inefficient, but also increases hardware costs and maintenance difficulties, and it is difficult to meet the needs of efficient and safe maintenance.

[0003] NAT (Network Address Translation) technology is widely used in network environments as an effective means to solve the problem of insufficient IP addresses and hide the internal network structure. By mapping private IP addresses to IP addresses that can be identified in the public network, NAT technology achieves address translation and data isolation for the internal network. However, the limitation of NAT technology is that when remote maintenance of multiple private networks is required, the encryption and security of data transmission cannot be ensured, and the management and adjustment of NAT rules become cumbersome and difficult to respond dynamically 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 ensure the security and integrity of data transmission. L2TP tunnels encrypt data to ensure confidentiality and anti-interference capabilities during data transmission, making it suitable for remote maintenance and access. However, when encapsulating data packets, L2TP often encapsulates data in the tunnel, causing NAT to be unable to identify the internal information of the data packet, and thus unable to correctly perform the mapping of private IP addresses to public IP addresses.

[0005] Therefore, there is a contradiction in the simultaneous application of NAT and L2TP technologies: NAT needs to perform address translation on data streams, while the encrypted data packets of the L2TP tunnel make it difficult for NAT to identify and process, resulting in the inability to correctly map and securely transmit private IP and public IP. Based on this, the 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. Summary of the invention

[0006] This embodiment provides a remote multi-network integration maintenance and management method, system, electronic device and storage medium based on the combination of NAT and L2TP technologies, and explores how to solve the problem existing in the background technology that the 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 integration maintenance and management.

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

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

[0009] 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;

[0010] 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;

[0011] Record remote access logs and verify terminal permissions based on access control lists (ACLs) to restrict unauthorized access;

[0012] When receiving remote maintenance instructions, it parses and executes system maintenance operations, generates a maintenance status report after completion, and feeds the maintenance log back to the management platform.

[0013] In some of the embodiments, determining the NAT mapping relationship between the private IP address and the public IP address of each service-specific network includes:

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

[0015] 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;

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

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

[0018]

[0019] Among them, IP p Represents the private IP address set of each business private network, IP uIndicates 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 ith public IP address and n is the total number of private IP addresses.

[0020] In some embodiments, the NAT mapping relationship is dynamically adjusted, an L2TP tunnel is established, and a security access right is allocated to a remote terminal to synchronize data encryption transmission in the L2TP tunnel and data isolation of each service-specific network, including:

[0021] S2-1. Monitor network data traffic in real time. When the network data traffic is abnormal, dynamically map and adjust the IP address in transmission according to the configured NAT rules.

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

[0023] 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;

[0024] 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;

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

[0026] The expression for isolating each business private network by the NAT rule is:

[0027]

[0028] in, Indicates the transmission IP address in the sth business private network. The public network mapping 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.

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

[0030] 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;

[0031] S3-2. Monitor the data isolation status between private networks in real time, and dynamically adjust NAT and L2TP tunnel strategies based on network traffic and access requests.

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

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

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

[0035] In some of the embodiments, when a remote maintenance instruction is received, a system maintenance operation is parsed and executed, and after completion, a maintenance status report is generated and a maintenance log is fed back to the management platform, including:

[0036] 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;

[0037] 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.

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

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

[0040] 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;

[0041] 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 the data encryption transmission in the L2TP tunnel and the data isolation of each service-specific network;

[0042] The adjustment unit is used to map the request to the corresponding business private network in real time when the remote terminal is accessed, monitor the request flow and the data transmission status between each business private network, and dynamically adjust the NAT and L2TP tunnel strategies;

[0043] A recording unit is used to record remote access logs and verify terminal permissions based on the access control list (ACL) to restrict unauthorized access;

[0044] 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.

[0045] In a third aspect, the present invention provides an electronic device, comprising a memory and a processor, wherein the memory stores at least one computer executable instruction, and the processor is configured to run the computer executable instruction. When the computer executable instruction 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 the first aspect is implemented.

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

[0047] Compared with the prior art, the beneficial effects of the remote multi-network integration 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 the beneficial effects of the above-mentioned remote multi-network integration maintenance management method based on the combination of NAT and L2TP technologies, so they will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A schematic diagram of the steps of a remote multi-network integration maintenance and management method based on the combination of NAT and L2TP technologies in an embodiment provided by the present invention;

[0049] Figure 2 A structural block diagram of remote multi-network integration maintenance and management based on the combination of NAT and L2TP technologies in the embodiment provided by the present invention;

[0050] Figure 3 A network topology diagram in an embodiment of the present invention;

[0051] Figure 4 A diagram of an electronic device in an embodiment of the present invention; DETAILED DESCRIPTION

[0052] In order to more clearly understand the purpose, technical solutions and advantages of the present application, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0053] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the general meaning understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the", "these" and the like in this application do not represent quantitative restrictions, and they can be singular or plural. The terms "include", "comprise", "have" and any variants thereof involved in this application are intended to cover non-exclusive inclusions; for example, a process, method and system, product or device comprising 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 to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether directly or indirectly. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. Usually, the character " / " indicates that the objects associated with each other are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of 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, NAT (Network Address Translation) is a network technology used to convert between private IP addresses within a network and public IP addresses of external networks. It is implemented on network devices such as routers or firewalls, allowing multiple devices to communicate with external networks (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 private IP address of the device into a public IP address that can be used for Internet communication. When the 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, L2TP (Layer 2 Tunneling Protocol) is a tunneling protocol used to create a virtual "tunnel" through a public network (such as the Internet) to transmit data. L2TP works 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 and restored to the original data when it arrives at the destination.

[0057] refer to Figures 1 to 4 In an embodiment of the present invention, a remote multi-network integration maintenance and management method based on the combination of NAT and L2TP technologies is provided.

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

[0059] Figure 1 The process includes:

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

[0061] Step S1 specifically includes:

[0062] S1-1. Obtain the private IP address of each business private network;

[0063] Specifically, please refer to Figure 3 The management method first communicates with each business private network and collects all private IP addresses used in each business private network, so as to fully understand the IP address distribution of each business private network, and then accurately provide basic data for subsequent configuration and management. Accurately obtaining private IP addresses ensures a complete understanding of the network structure of each business private network.

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

[0065] 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;

[0066] Specifically, after obtaining the private IP address information of each business private network, we start to analyze the private IP addresses and build the topology of the entire network. Based on each private IP address, combined with the connection mode and data flow between business private networks, we dynamically generate a complete network topology diagram, presenting the internal connection relationship of each business private network and the architecture of the overall network.

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

[0068] For example, in a video surveillance system, this method can quickly establish the network location relationship between each monitoring center and camera, accurately plan the transmission path of the monitoring data, ensure that the data can smoothly reach the designated destination, and facilitate subsequent remote management and maintenance.

[0069] S1-3, executing NAT rule configuration on the initialized network topology to determine the mapping of private IP addresses;

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

[0071]

[0072] 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 ith public IP address, n is the total number of private IP addresses;

[0073] Assuming that a private IP address is 192.168.1.10, NAT maps this address to 203.0.113.5, ensuring that devices inside the private network display this public IP when communicating with the outside world.

[0074] Specifically, after the network topology is initialized, the NAT rules are configured in detail for the topology to accurately map the private IP addresses of each business network to the corresponding public IP addresses. This configuration ensures that each private IP address accurately corresponds to the connection relationship in the network to avoid 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 ensures that internal data can be correctly transmitted in the public network, while maintaining the data independence and security of each business private network, and preventing internal network information from being directly exposed to the public network.

[0076] For example, 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 accurate IP address mapping, data exchange between medical systems can be ensured to be secure and independent, preventing sensitive information from being leaked.

[0077] The process also includes:

[0078] Step S2: dynamically adjust the NAT mapping relationship, establish an L2TP tunnel and assign security access rights to the remote terminal to synchronize the encrypted transmission of data in the L2TP tunnel and the isolation of data in each business private network.

[0079] Step S2 specifically includes:

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

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

[0082] 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;

[0083] Specifically, after completing the NAT rule configuration, the data traffic in the entire network is continuously monitored. Through real-time monitoring, any changes in the network are captured in a timely manner to ensure the stability and effectiveness of data transmission. Based on the monitored network data traffic, the IP address in transmission is dynamically adjusted according to the previously configured NAT rules.

[0084] When data traffic changes or anomalies occur, the IP address in transmission is immediately remapped according to the rules to ensure that the data can continue to follow the preset NAT rules. This dynamic adjustment mechanism enables the network to adapt to the ever-changing data flow environment and ensure the accuracy of data transmission.

[0085] For example, in an educational network, when a distance learning system encounters a sudden increase in data traffic (such as a large online exam or a live course), the system can ensure the stability of network communications and accurate data transmission by real-time monitoring and adjusting the NAT mapping relationship to prevent network congestion or data transmission errors.

[0086] S2-2. After completing all dynamic mapping adjustments, configure L2TP tunnel parameters. After the L2TP tunnel parameters are configured, establish the L2TP tunnel and assign security access rights to the L2TP tunnel for the remote terminal.

[0087] Specifically, after completing the dynamic mapping adjustment of all NAT rules, the L2TP tunnel is established. The L2TP tunnel creation process is started, and tunnel parameters are configured according to the predetermined security policy, including encryption method, authentication mechanism and transmission protocol, 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 terminal and assign corresponding security access rights to each remote terminal to ensure that only authorized terminals can access the business private network through the L2TP tunnel, implement secure access management for remote terminals, and ensure that data is effectively protected during transmission.

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

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

[0091] The expression for isolating each business private network by the NAT rule is:

[0092]

[0093] in, Indicates the transmission IP address in the sth business private network. The public network mapping 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.

[0094] 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 will be no confusion or crossover, ensuring the independence and isolation of data.

[0095] Specifically, after the L2TP tunnel is successfully established, encrypted data transmission begins through the tunnel to ensure that the data remains secure during the communication process between the remote terminal and the business private network, preventing the data from being eavesdropped, tampered with, or accessed without authorization.

[0096] At the same time, the previously configured NAT rules are applied to isolate the data flows from different business private networks, ensuring that the data between the business 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 business private network.

[0097] For example, in a video surveillance system, a remote terminal is connected to a surveillance center via an encrypted L2TP tunnel, and NAT rules are used to isolate surveillance data from different areas, thereby ensuring secure transmission of surveillance information and preventing data from different areas from interfering with each other.

[0098] The process also includes:

[0099] Step S3: 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 strategies are dynamically adjusted.

[0100] Step S3 specifically includes:

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

[0102] Specifically, when a remote terminal sends 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 relationship, the remote terminal's request is accurately mapped to the corresponding business private network to ensure that each access request can correctly reach the target private network and maintain accurate transmission and flow of data packets.

[0103] For example, in an educational network, this step ensures that remote teachers and students can accurately connect to designated teaching resources or online classrooms through the L2TP tunnel, avoiding mistaken connection to other teaching networks, and achieving accurate access to teaching resources.

[0104] 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;

[0105] Specifically, the data transmission status between each business private network is continuously monitored to ensure that data is strictly isolated between the private networks. Through real-time monitoring, the data transmission status between the private networks is promptly detected, and abnormalities in the data isolation status are quickly identified, such as a sudden increase in data transmission volume or abnormal access requests.

[0106] 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. Specific adjustments include:

[0107] Adjust NAT rules: If the number of access requests to a private network suddenly increases, or abnormal data traffic attempts to cross the boundary to enter other private networks, the system will automatically update the NAT mapping rules. For example:

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

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

[0110] 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. For example:

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

[0112] 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.

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

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

[0115] For example, in a financial transaction system, the monitoring mechanism can adjust strategies in a timely manner to prevent abnormal traffic from attacking the transaction system, ensure the security and independence of data transmission between each business outlet, and avoid tampering or leakage of transaction data due to abnormal traffic.

[0116] The process also includes:

[0117] Step S4: record the remote access log and verify the terminal authority according to the access control list (ACL) to restrict unauthorized access.

[0118] Step S4 specifically includes:

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

[0120] Specifically, every remote access activity is recorded in detail, including access time, terminal device identification, business private network accessed, etc. By completely tracking each access behavior, a complete access record chain is formed to ensure that every access action is traceable and verifiable.

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

[0122] For example, in actual applications, when remotely maintaining a video surveillance system, through this log recording function, the operation and maintenance personnel can track the remote access to each monitoring center or camera, and promptly discover and deal with potential security issues. In financial transaction systems, access log records can help track the operation behavior of each remote transaction maintenance, ensure that the maintenance process meets regulatory requirements, and prevent abnormal operations or potential threats.

[0123] S4-2. Verify the permissions of all access terminals based on the access control list (ACL) to restrict unauthorized terminal access.

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

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

[0126] For example, in the maintenance of medical information systems, 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 educational networks, this mechanism can limit access to campus networks or remote teaching networks to authorized terminals only, ensuring data security.

[0127] The process also includes:

[0128] Step S5: When receiving the remote maintenance instruction, parse and execute the system maintenance operation, generate a maintenance status report after completion and feed back 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, the instruction content is immediately analyzed in detail to identify the operation requirements and target objects of the instruction. After the analysis is completed, the status update, configuration modification or other maintenance operations of the private network system are automatically executed to ensure that the maintenance task can be completed accurately.

[0132] This automated execution process avoids errors caused by manual operations and ensures the accuracy and timeliness of maintenance work. It 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] For example, in a video surveillance system, this function can realize remote adjustment of camera configuration, monitoring range and parameters, and respond to emergencies in a timely manner; in a financial transaction system, automatically executed maintenance instructions can ensure rapid adjustment and updating of the transaction network configuration, ensuring the security and efficient operation of the system.

[0134] 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.

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

[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] For example, in medical information systems, such reports and logs can ensure that every maintenance and update of the medical record system is recorded in detail to meet the review requirements of regulatory authorities; in educational network applications, maintenance status reports can provide the school's IT department with clear maintenance records to ensure efficient and transparent management of the campus network.

[0138] In this embodiment, a remote multi-network integration maintenance and management method based on the combination of NAT and L2TP technologies is used. Through the synchronous application of NAT and L2TP technologies, during the data transmission process, the private IP address is first mapped through NAT, and then an encrypted tunnel is built using L2TP to encapsulate and transmit the mapped data. By dynamically adjusting the NAT mapping rules and the L2TP tunnel strategy, 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 problem of security and isolation of data transmission in multi-network integration, and realizes efficient and secure remote multi-network integration maintenance and 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 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 the data encryption transmission in the L2TP tunnel and the data isolation of each service-specific network;

[0146] The adjustment unit is used to map the request to the corresponding business private network in real time when the remote terminal is accessed, monitor the request flow and the data transmission status between each business private network, and dynamically adjust the NAT and L2TP tunnel strategies;

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

[0148] The maintenance unit is used to receive remote maintenance instructions, analyze and execute system maintenance operations, generate maintenance status reports after completion, and feed back maintenance logs to the management platform.

[0149] In the above system, the NAT mapping relationship is determined through the mapping unit; the data encryption transmission in the L2TP tunnel and the data isolation of each business private network are synchronized through the encryption isolation dual-function unit; the NAT and L2TP tunnel policies are dynamically adjusted through the adjustment unit; the unauthorized access is restricted through the recording unit; the maintenance log is fed back to the management platform through the maintenance unit, which solves the problem that the 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 integration maintenance management.

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

[0151] The electronic device may include a processor 210, a communications interface 220, a memory 230, and a communications bus 240, wherein the processor 210, the communications interface 220, and the memory 230 communicate with each other via the communications bus 240. The processor 210 may call the logic instructions in the memory 230 to execute a remote multi-network integration maintenance management method based on the combination of NAT and L2TP technologies disclosed in this embodiment.

[0152] In addition, the logic instructions in the above-mentioned memory 230 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0153] The system embodiments described above are merely illustrative, wherein 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, i.e., they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

[0154] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the 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, it parses and executes system maintenance operations, generates a maintenance status report after completion, and feeds the maintenance log back to the management platform.

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 ith public IP address and n is the total number of private IP addresses.

3. A remote multi-network integration maintenance and management method based on the combination of NAT and L2TP technology according to claim 2, characterized in that: 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, including: S2-1. Monitor network data traffic in real time. When the network data traffic is abnormal, dynamically map and adjust 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 mapping 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.

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 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. Monitor the data isolation status between private networks in real time, and dynamically adjust NAT and L2TP tunnel strategies based on network traffic and access requests.

5. 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.

6. The remote multi-network integration maintenance and management method based on the combination of NAT and L2TP technology according to claim 3 is 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.

7. A remote multi-network integration 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 the data encryption transmission in the L2TP tunnel and the 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 is accessed, 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.

8. 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 6 is implemented.

9. 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 6 is implemented.

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