# Burp Suite

## Upstream proxy servers

From here <https://portswigger.net/burp/documentation/enterprise/user-guide/working-with-sites/site-settings/upstream-proxy-servers>

We first launch proxy.py using proxychains:

```bash
proxychains -q proxy
```

```bash
python3 -m venv virtual-environment-to-proxy
source virtual-environment-to-proxy/bin/activate
pip3 install --upgrade proxy.py
proxychains -q proxy
```

This will automatically generate an HTTP proxy in `127.0.0.1:8899`

* Open Burp Suite
* Settings
* Connections
* Upstream proxy servers

Set the upstream 8899 proxy to require that Burp Suite makes a request first to that server and then the proxy will process the request.

<figure><img src="/files/mFAaYgNuBgrdny35tOe3" alt=""><figcaption></figcaption></figure>

Selecting our Burp Suite proxy with `foxyproxy`, we could interact with any site that our `proxychains` tunnel contains.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://lanzt.gitbook.io/cheatsheet-pentest/pivoting/burp-suite.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.