SSH Session Isolation Using Zero Trust Network Namespaces
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing network protocols like SSH allow unauthorized access and lateral movement within secure networks, posing security risks for remote access scenarios.
Innovation Solution
Implementing a zero trust cloud architecture with isolated network namespaces and policy-driven communication piping to secure SSH sessions, ensuring access is limited to authorized resources only.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SSH protocol is used to provide secure network access, then secure channel is established, but unauthorized access and lateral movement within the network becomes possible
Solution Approach 1:
The patent applies network namespace isolation to segment the network into separate logical environments. Each user session is confined to its own network namespace, preventing lateral movement between different user contexts while maintaining secure SSH access. This segmentation resolves the contradiction by allowing secure authentication while preventing unauthorized network exploration.
Solution Approach 2:
The patent introduces a zero trust cloud environment as an intermediary layer between the client and the secure network. This intermediary validates each access request against security policies before allowing communication, thereby maintaining secure channels while preventing unauthorized access attempts that would bypass traditional perimeter security.
2Ease of operation
If remote access is enabled for employees, then work flexibility is improved, but network security risk increases
Solution Approach 1:
The zero trust cloud environment serves as a mediator that enables remote access while maintaining security. It validates each remote connection request against stored security policies, allowing flexible work arrangements for authorized users while blocking unauthorized access attempts, thus resolving the contradiction between ease of operation and security risk.
Solution Approach 2:
The system performs preliminary authentication and policy validation before allowing any network access. By verifying credentials and checking security policies in advance, the system enables remote workers to access the network flexibly while preventing security risks from unauthorized users before they can cause harm.
3Productivity
If network access is granted to remote users, then productivity is improved, but lateral movement attacks become more successful
Solution Approach 1:
The patent segments the network into isolated network namespaces for each user session. This segmentation contains lateral movement attacks within individual namespaces, preventing attackers from moving between different user contexts. Productivity is maintained through secure remote access, while the segmentation blocks lateral movement attack vectors.
Solution Approach 2:
The system creates temporary, disposable network namespaces for each remote user session. These isolated namespaces are discarded after the session ends, preventing persistence of attack vectors. This approach maintains productivity through enabled remote work while neutralizing lateral movement attacks by confining them to temporary, isolated environments.
Data Source
AI summary
A zero trust cloud environment provides access to a secure network, and secure network applications. The zero trust cloud environment performs authentication of a user account, and upon successful completion initiates a secure network application, such as an SSH session to a server in a secure network. The server is instructed to generate an isolated network namespace through which a virtual network interface is bridged to the default network namespace. A firewall of the default network namespace does not permit network traffic from the virtual network interface to pass if it is directed to an address of the secure network.