MASTG-TECH-0121: Intercepting Non-HTTP Traffic Using an Interception Proxy

Interception proxies such as Burp Suite and ZAP won't show non-HTTP traffic, because they aren't capable of decoding it properly by default. They can, however, be extended using the following tools, allowing you to intercept and manipulate non-HTTP traffic:

• Burp-non-HTTP-Extension and
• Mitm-relay.

Note that this setup can sometimes become very tedious and is not as straightforward as testing HTTP.