Network Namespace Isolation for Linux Security
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Solution Overview
Problem
In Linux systems, network changes made by one user can affect the entire system, leading to interference and security vulnerabilities, as all accounts share network resources and configurations.
Innovation Solution
A communication control method that isolates networks by generating distinct network namespaces and allocating virtual interfaces to each namespace, allowing independent management and enhanced security through encapsulation and tunneling between user terminals and a gateway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If all accounts share network resources and configurations in a Linux system, then network management is simplified and resources are efficiently utilized, but network changes made by one user can affect the entire system leading to interference and security vulnerabilities
Solution Approach 1:
The patent divides the shared network space into separate network namespaces, where each namespace is isolated from others. This segmentation allows different users or applications to have their own independent network configurations while sharing the underlying physical network resources, thus maintaining security while enabling resource sharing.
Solution Approach 2:
The patent introduces network namespaces as an intermediary layer between users and the physical network resources. This intermediary enables controlled access and isolation, allowing resource sharing while preventing direct interference between different users' network operations.
2Reliability
If network namespaces are generated for each user terminal, then network isolation and security are enhanced, but system complexity increases due to multiple virtual interfaces and routing tables
Solution Approach 1:
The patent makes the gateway device universal by enabling it to handle multiple network namespaces and their associated virtual interfaces through a standardized procedure. This multi-functionality allows the gateway to manage diverse network configurations without requiring separate specialized handling for each namespace, thus reducing overall system complexity.
Solution Approach 2:
The patent implements automated procedures where the gateway automatically generates virtual interfaces, configures routing tables, and manages network namespaces without requiring manual intervention. This self-service approach reduces operational complexity despite the increased number of virtual components.
3Ease of operation
If virtual interfaces are allocated to each network namespace, then independent network management is achieved, but additional authority requirements increase security verification complexity
Solution Approach 1:
The patent applies different authority levels locally to different network namespaces and their associated virtual interfaces. Each namespace can have customized access controls and authority requirements tailored to its specific needs, allowing fine-grained security management without requiring complex global verification mechanisms.
Data Source
AI summary
A communication control method performed by a controller may include receiving, from at least one of a first user terminal and a second user terminal, a network generation request for a first network that connects the first user terminal and the second user terminal, in response to the network generation request, transmitting a first network namespace generation request corresponding to at least one of the first user terminal and the second user terminal to a gateway, and when a first network namespace is generated in the gateway in response to the first network namespace generation request, transmitting information about a first virtual interface to be allocated to the first network namespace to the gateway.