A demo page that reveals local IP address(es) from RTCIceCandidate.foundation parameter of WebRTC candidate report.

For more information and the demo: https://niespodd.github.io/webrtc-local-ip-leak/

This repository includes pre-generated lookup tables for IP-s in subnets:

• 192.168.0.0/16
• 10.0.0.0/8
• 172.16.0.0/12
• (extra) 172.0.0.1 - 172.255.255.1 (0-255 for the two middle bytes) this allows detection of local WSL subnet on Windows hosts

The output is split into chunks in db/[0-999].json.gz because a single file weights easily over 100-s of MBs and loading such in a browser would be (very likely?) painful. Pardon Github!

Use python lookup_gen.py to generate your own. There are (only as little as) 255^4 IPv4 so all possible combinations could be generated as well.

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