---
id: 5517
title: "Exposing Intranets with reliable Browser-based Port scanning"
source_domain: portswigger.net
source_url: "https://portswigger.net/research/exposing-intranets-with-reliable-browser-based-port-scanning"
published_at: "2018-11-09T14:47:00Z"
tags: ["browser-security", "portswigger", "javascript", "chrome", "recon", "port-scanning", "intranet"]
phying_url: "https://phying.com/item/5517"
lang: en
---

# Exposing Intranets with reliable Browser-based Port scanning

## Summary

Gareth Heyes builds a reliable browser-based port scanner, distinguishing open ports via Chrome's chrome-error:// behavior and counting iframe onload events.

## Intelligence Metadata

- **Sources:** portswigger.net
- **Published:** 2018-11-09T14:47:00Z
- **Original:** https://portswigger.net/research/exposing-intranets-with-reliable-browser-based-port-scanning
- **Phying News:** https://phying.com/item/5517