Gateway NAT for Dynamic IP Security in Cloud Networks
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Solution Overview
Problem
Multi-tenant and multi-region cloud-based networks face significant security challenges due to dynamic IP addresses assigned to client devices, which traditional IP-based security measures struggle to manage effectively, leading to complexity and potential vulnerabilities.
Innovation Solution
Implementing address translation at gateways to map dynamic IP addresses to unique static IP addresses, allowing security engines to enforce security policies based on user identities, decoupling network traffic from security layers and enhancing flexibility and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic IP addresses are assigned to client devices in multi-tenant cloud networks, then network flexibility and scalability are improved, but security management complexity increases and traditional IP-based security measures become ineffective
Solution Approach 1:
The patent introduces a gateway as an intermediary component between client devices and the cloud network. The gateway performs Network Address Translation (NAT) to map dynamic IP addresses to static IP addresses, enabling traditional IP-based security engines to effectively secure dynamic IP environments. This intermediary layer resolves the contradiction by maintaining network flexibility while restoring security manageability.
Solution Approach 2:
The system segments the network architecture into distinct functional layers: client devices, gateway (with NAT functionality), and cloud network infrastructure. This segmentation isolates the complexity of dynamic IP management at the gateway layer, allowing the core cloud network to maintain simplicity and scalability while security policies are applied at the gateway boundary.
2Productivity
If dynamic IP addresses are used for client devices, then network scalability is improved, but the effectiveness of traditional IP-based security engines deteriorates
Solution Approach 1:
The gateway creates a static IP address copy or representation for each dynamic IP address through NAT translation. This static IP copy allows existing IP-based security engines to operate unchanged on the translated addresses, maintaining security effectiveness while the underlying network continues to use dynamic IP addressing for scalability.
3Reliability
If address translation is implemented at gateways, then security policy enforcement is improved, but network traffic processing overhead increases
Solution Approach 1:
The gateway performs address translation and security policy enforcement in advance, before traffic reaches the core cloud network. By pre-translating dynamic IP addresses to static addresses and applying security policies at the gateway boundary, the system ensures security compliance without adding processing overhead to subsequent traffic flows within the cloud network.
Data Source
AI summary
Provided herein are systems, devices and methods for applying address translation to network traffic originating from client devices having dynamic Internet Protocol (IP) addresses to support IP based security measures using a gateway configured to connect a plurality of client devices used by a plurality of users to a plurality of cloud based networks. The gateway may receive, from a client device assigned a dynamic IP address, credentials of a user using the respective client device, access a translation record mapping the user, identified by his credentials, to a respective unique static IP address, adjust a source address of each packet received from the client device to include the static IP address, and forward each adjusted packet to a security engine configured to apply security policy(s) to each adjusted packet before transmitting it to the cloud based network(s). The security policy(s) is applied according to the static IP address.