Network Interface Response Routing for Subnet Security
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Solution Overview
Problem
In office environments with multiple subnet environments, communication terminals often face challenges in ensuring that responses to requests are transmitted to the correct subnet, leading to potential security issues and data leakage due to incorrect routing settings.
Innovation Solution
An information processing apparatus with multiple network interfaces is configured to receive requests, generate responses with reversed source and destination IP addresses, and prevent responses from being transmitted through an incorrect network interface, ensuring that responses are sent through the appropriate interface for the destination subnet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the communication terminal transmits a response via the default gateway, then the response can be transmitted through a preset gateway, but the response may fail to reach the subnet to which the source terminal of the request is connected
Solution Approach 1:
The patent applies preliminary action by recording the interface information that received the request packet before generating the response packet. This pre-recorded interface information is then used to determine the correct transmission interface for the response, ensuring the response is sent back through the appropriate gateway to reach the source terminal's subnet.
Solution Approach 2:
The patent implements feedback by comparing the recorded interface information (from which the request was received) with the interface determined by the routing table for response transmission. This feedback mechanism identifies mismatches and prevents incorrect routing, ensuring responses are transmitted through the correct interface to reach the originating subnet.
2Reliability
If static routing is configured for each destination terminal, then responses can be routed to particular gateways, but the device complexity increases
Solution Approach 1:
The patent applies self-service by automatically recording interface information when request packets are received and autonomously using this recorded information to determine the correct response transmission interface. This eliminates the need for manual static routing configuration for each destination terminal, as the system automatically manages its own routing decisions based on the recorded interface data.
Data Source
AI summary
An information processing apparatus with a plurality of network interfaces is provided. The information processing apparatus comprises at least one memory that stores a set of instructions, and at least one processor that executes the instructions to control to receive a request via one of the plurality of networks, generate a response to a source of the received request, the response indicating the source of the request set as a destination address and a destination address of the request set as a source address, and in a case where the network interface having received the request is different from a network interface determined to be used for communication with a destination identified by the destination address set in the generated response, prevent the response from the different network interface.