DNAT Router Detection Through HTTPS CONNECT Proxy Headers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing network monitoring tools struggle to accurately detect and monitor network paths through encrypted tunnels, leading to incomplete data collection and misinterpretation of network states due to protocol blocking and port restrictions, especially in cloud-based environments.
Innovation Solution
A cloud-based system and method that utilizes HTTP CONNECT requests to identify Destination Network Address Translation (DNAT) routers by analyzing proxy headers, performs traces using various protocols, and aggregates network path details to provide a holistic view, confirming DNAT routers through load balancer IP address comparisons.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If existing network monitoring tools are used to monitor network paths through encrypted tunnels, then monitoring coverage is limited, but measurement precision and reliability of network path detection deteriorate due to protocol blocking and port restrictions
Solution Approach 1:
The patent introduces an intermediary detection mechanism that sends HTTP CONNECT requests through the encrypted tunnel to interact with potential DNAT routers. This intermediary approach allows the system to probe network paths without requiring direct visibility into encrypted traffic, thereby resolving the contradiction between maintaining monitoring coverage and achieving precise DNAT router detection through header analysis of responses.
2Measurement precision
If HTTP CONNECT requests are sent to detect DNAT routers, then detection capability improves, but device complexity and operational overhead increase
Solution Approach 1:
The monitoring system is designed to perform multiple functions: it can detect DNAT routers, monitor network paths, and analyze headers from various protocols (HTTP, ICMP, TCP, UDP) through a unified framework. This multi-functionality reduces the need for separate specialized tools, thereby managing device complexity while maintaining high detection precision through standardized header analysis procedures.
3Reliability
If comprehensive header analysis is performed on proxy responses, then detection reliability improves, but processing time and operational complexity increase
Solution Approach 1:
The system extracts only the critical header information needed for DNAT router detection from the proxy responses, rather than performing comprehensive analysis of all headers. This selective extraction approach maintains high detection reliability by focusing on key identifying fields while significantly reducing processing time and operational complexity by ignoring irrelevant data.
Data Source
AI summary
Techniques for detecting Destination Network Address Translation (DNAT) in network paths. Systems and methods include sending a Hypertext Transfer Protocol Secure (HTTPS) CONNECT request to a proxy in a network path; receiving a response to the HTTP request; monitoring a header of the response to the HTTPS request; and determining that the proxy is a Destination Network Address Translation (DNAT) router based on information in the header. The steps can further include performing a plurality of traces, for a plurality of legs of the network path based on the determining; and aggregating details related to the plurality of legs of the network path to provide a holistic view of the network.