Ingress-Egress Address Translation for Secure Callback Verification
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Solution Overview
Problem
Existing network address translation methods in cloud-native technologies, such as Kubernetes, fail to ensure consistency between ingress and egress addresses, compromising security authentication and network communication efficiency due to transient container addresses and complex network architectures.
Innovation Solution
Implement a method for address translation that translates the source address of a callback to the network address of an ingress controller using an egress container group, ensuring consistent destination addresses for secure and efficient communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional network address translation methods are used in cloud-native technologies, then network communication can be established, but consistency between ingress and egress addresses cannot be ensured, compromising security authentication
Solution Approach 1:
The system pre-establishes address mapping relationships between ingress and egress addresses before actual network communication occurs. The ingress controller pre-translates external access requests and stores the mapping information, ensuring that when callbacks occur, the address consistency can be verified against these pre-established mappings, thus ensuring security authentication while managing complexity through advance preparation
Solution Approach 2:
The ingress controller acts as an intermediary component that mediates between external networks and cluster services. It performs address translation for both ingress requests and egress callbacks, ensuring that the source address of callbacks matches the destination address of original requests. This intermediary mechanism guarantees address consistency for security authentication without requiring complex changes to the underlying network infrastructure
2Adaptability or versatility
If transient container addresses are used in dynamic container environments, then container mobility and scalability are improved, but address consistency between ingress and egress cannot be maintained
Solution Approach 1:
The system implements a feedback mechanism where the ingress controller monitors and tracks address mappings between ingress and egress operations. When containers are created, moved, or destroyed, the controller receives feedback about these changes and dynamically updates the address mapping relationships. This feedback loop ensures that even in dynamic container environments, the address consistency required for security authentication is maintained through real-time adaptation
Solution Approach 2:
The address translation system is designed to be dynamic rather than static. The ingress controller continuously adapts address mappings based on the current state of container services. When container addresses change due to mobility or scaling events, the controller dynamically updates the translation rules to maintain consistency between ingress destination addresses and egress source addresses, thus preserving reliability while allowing container adaptability
3Reliability
If address translation is implemented to ensure security, then network security is improved, but network communication efficiency decreases due to additional translation overhead
Solution Approach 1:
Address translation mappings are pre-computed and cached before actual network communication occurs. The ingress controller establishes translation rules in advance based on service registrations and container deployments. During runtime, these pre-established mappings are used directly without requiring complex real-time calculations, thus ensuring network security through comprehensive address verification while minimizing communication overhead by avoiding repeated translation computations
Solution Approach 2:
The system creates and maintains copy mappings of address relationships that can be quickly referenced during network communication. Instead of performing full address translation calculations for every packet, the system uses pre-created address mapping copies that enable fast lookup and verification. This copying mechanism ensures security through thorough address validation while improving efficiency by replacing complex real-time translation with fast map lookups
Data Source
AI summary
The present disclosure relates to a method, system, and computer program product for address translation. The method includes receiving an access request from the outside of a cluster service to the inside by an ingress control service. The method further includes generating a callback for the access request in response to receiving the access request. The method further includes translating a source address of the callback to a network address of the ingress control service by an egress container group, wherein the network address of the ingress control service is a destination address of the access request. According to embodiments of the present disclosure, by this method of translating the source address of the callback to the destination address of the access request, it is possible to enhance the security of network communication and improve the convenience of network management, which enhances the management experience of a network administrator.