Communication Device IP Address Type Detection and Response Control
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Solution Overview
Problem
Existing communication systems struggle to effectively manage and restrict response signals based on the IP address of the sender device, particularly when dealing with global and private IP networks, leading to potential security and functionality issues.
Innovation Solution
A communication device equipped with a processor and memory that receives request signals, determines the IP address type, and sends response signals only if the IP address is not a global IP address, thereby restricting responses from external devices not within the authorized network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the image processing device sends system information to communication devices connected to global IP networks, then the communication device can access system information, but security risks increase due to potential unauthorized access from external devices
Solution Approach 1:
The patent applies local quality by differentiating treatment based on the IP address type. Private IP addresses (local network) receive full access to system information, while global IP addresses (external network) receive restricted access only through proxy servers. This creates different access qualities for different network locations, resolving the contradiction between providing broad access and maintaining security.
Solution Approach 2:
The patent introduces a proxy server as an intermediary for global IP networks. Instead of direct access, external devices must go through the proxy server to request system information. This intermediary layer enables controlled access, allowing the system to provide information to external devices while maintaining security through the proxy's authentication and authorization mechanisms.
2Reliability
If the image processing device restricts sending of response signals to global IP addresses, then network security is enhanced, but functionality is reduced for legitimate external access
Solution Approach 1:
The patent applies dynamics by making the access control policy conditional and adaptable. The system dynamically adjusts its behavior based on the IP address type: private IPs get unrestricted access, while global IPs get access only through proxy servers. This dynamic policy allows the system to maintain security while preserving functionality for legitimate external access scenarios.
Solution Approach 2:
The proxy server acts as an intermediary that mediates between external devices and the image processing device. It filters and controls the traffic, allowing legitimate external access while blocking unauthorized requests. This resolves the contradiction by enabling external access functionality through a secure intermediary layer rather than direct access.
3Reliability
If the communication device determines IP address type before sending response signals, then unauthorized access is prevented, but processing complexity increases
Solution Approach 1:
The patent applies parameter changes by using IP address type (global vs. private) as the key parameter for access control decisions. The system changes its behavior parameters (access granted or restricted, direct or proxy-mediated) based on this single identifying parameter. This approach maintains access control reliability while keeping processing relatively simple, as it relies on standard IP address classification rather than complex authentication protocols.
Data Source
AI summary
A communication device may: receive a request signal from an external device via a communication interface, the request signal including a first IP address of the external device as a sender address; determine whether the first IP address in the request signal is a global IP address in a case where the request signal is received from the external device; and send a response signal to the request signal to the external device in a case where it is determined that the first IP address is not the global IP address, wherein sending of the request signal is restricted in a case where it is determined that the first IP address is the global IP address.