Multi-hop SSH Tunnel Automation via Segmented Configuration
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Solution Overview
Problem
Establishing multi-hop SSH connections is cumbersome for users, requiring them to manually execute the SSH application multiple times and remember the correct order of hops, which can be complex and error-prone.
Innovation Solution
A configuration file with named sections for each hop is defined, allowing the SSH client to automatically establish connections by using parameter values from one section to initiate subsequent SSH connections, simplifying the process and reducing user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual execution of SSH application multiple times is required for multi-hop connections, then security authentication is maintained, but user operation complexity increases significantly
Solution Approach 1:
The configuration file is segmented into multiple named sections, each defining parameters for a specific hop in the multi-hop SSH connection. This segmentation allows the complex multi-hop connection process to be broken down into manageable, predefined segments that the SSH client can automatically execute in sequence, eliminating the need for manual repeated authentication while maintaining security.
2Ease of operation
If automated SSH connection establishment is implemented, then ease of operation improves, but user knowledge requirements decrease which may reduce security awareness
Solution Approach 1:
Security-related parameters such as authentication methods, cipher suites, and protocol versions are pre-configured in the named sections of the configuration file before the SSH connection is established. This preliminary action ensures that security settings are properly established in advance, maintaining security awareness and control while enabling automated connection execution without requiring user knowledge of the tunnel structure.
3Productivity
If multiple SSH client instances are automatically established, then connection establishment speed improves, but system resource consumption increases
Solution Approach 1:
The SSH client dynamically manages the creation and destruction of multiple client instances based on the multi-hop connection requirements defined in the configuration file. Instances are created only when needed for specific hops and are properly managed to optimize resource usage, allowing fast automated connection establishment while controlling system resource consumption through dynamic instance management.
Data Source
AI summary
A method of establishing a secure communication channel between end nodes of an IP communication network via one or more intermediate nodes using the Secure Shell, SSH, protocol, the method comprising defining an SSH configuration file containing a plurality of sections, each section defining parameter values for a corresponding hop of the tunnel and an identification of the section defining parameter values for any subsequent hop. At that end node, a first instance of an SSH client is established, with the name of the configuration file being an initialization value for the first instance, and using the parameter values contained in a first section of the configuration file to establish a first SSH connection to the next node in the sequence. Following establishment of said first SSH connection, one or more further instances of the SSH client are established, with an identification of said configuration file and an identification of a corresponding section of the configuration file being an initialization value for an SSH instance, the or each further instance using the parameter values contained in the corresponding named section of the configuration file to establish an SSH connection to a subsequent node in the sequence over the already established SSH connection(s).