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simplewall
Discontinued Simple tool to configure Windows Filtering Platform (WFP) which can configure network activity on your computer.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
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offline-browser-communication
Demonstration of a browser connecting to Pion WebRTC without a signaling server.
A similar type of timing attack can be used to port scan your local machine from your browser.
https://github.com/Flu1dTeam/PortScanner
A while ago, eBay got caught doing this.
https://blog.nem.ec/2020/05/24/ebay-port-scanning/
Yes that is (almost) possible!
https://github.com/pion/offline-browser-communication
If the W3C accepted this as a valid use case it could be available quickly.