Network Manager for NAT Device Management
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Solution Overview
Problem
Network managers face challenges in managing network devices behind Network Address Translation (NAT) devices due to the lack of effective methods that do not compromise security functions, particularly in industrial environments where multiple machines use the same IP address range.
Innovation Solution
A centralized network management system is implemented using a network switch's MAC address table, ARP table, and a unique switch identifier to manage devices behind the NAT device, enabling secure communication through encrypted XMPP to maintain control and monitoring without requiring port address translation, allowing for real-time management and discovery of devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If Network Address Translation (NAT) is used to conserve global address space, then IP address exhaustion is mitigated, but network management of devices behind NAT becomes difficult
Solution Approach 1:
The patent introduces a network manager as an intermediary system that operates within the private network behind the NAT device. This network manager maintains a mapping table that correlates private IP addresses with their corresponding public IP addresses and port numbers, enabling centralized management of devices behind NAT without requiring changes to the NAT infrastructure or compromising security functions.
2Ease of operation
If Port Address Translation (PAT) is implemented to enable network management behind NAT, then device accessibility is improved, but security functions are compromised
Solution Approach 1:
The patent segments the network management function from the NAT device itself by deploying a dedicated network manager within the private network. This segmentation allows management operations to be performed on devices behind NAT through the network manager's knowledge of address mappings, eliminating the need for PAT security holes while maintaining both security and accessibility.
3Quantity of substance
If multiple machines use the same IP address range behind different NAT devices, then address space utilization is optimized, but device identification and management becomes complex
Solution Approach 1:
The network manager acts as an intermediary that maintains a comprehensive mapping table storing the relationship between private IP addresses, public IP addresses, and port numbers for each device behind NAT. This centralized mapping information allows the network manager to uniquely identify and manage devices even when multiple private networks use the same IP address ranges, eliminating the complexity of device identification.
Data Source
AI summary
Network device management may be provided. By utilizing a network ID tag (i.e., a switch identifier) corresponding to a network switch, a network management platform on a server may access network devices that exist behind the network switch. The network switch may comprise a network address translation (NAT) device. The network devices may comprise an industrial network comprising groups of machines that exist as islands behind their own respective network switches where each group of machines may utilize the same internet protocol (IP) addresses as other group of machines in the industrial network.