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Application & OT Security · Foundational

Intercepting Proxy

A tool that sits between a browser or app and a server to capture, inspect and modify HTTP(S) traffic.

Definition

Testers install the proxy's CA certificate so it can decrypt TLS. It demonstrates why client-side controls cannot be trusted: any request can be altered before it reaches the server.

Example

Routing a mobile app through an intercepting proxy shows its API calls and hidden parameters.

Exam tip

An intercepting proxy is how client-side validation is bypassed.

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