How can https://www.whatismyip.com/ see my LAN IP address?

Question

The website is showing my correct internal LAN IP address.

It does not work in Safari.

I do not suspect this is an XKCD #628 attack. How is this website implementing this?

score 3 · Accepted Answer · answered Dec 04 '18 at 13:20

3

This is because of WebRTC feature.WebRTC feature will leak your IP address even if you are behind a proxy server or using a VPN service.

answered Dec 04 '18 at 13:20

Abhijith V

1

This sounds very interesting and goes against many of the Internets common knowledge bases, would be nice for a more detailed answer. – Timothy L.J. Stewart Feb 07 '19 at 15:56

1 Answers1