Show HN: Get your local and public IP addresses in JavaScript
I use this exact method for fraud detection. 99% of the time, carders " " will simply load up a proxy in Firefox/Chrome (usually a socks5) and fire away. They typically don't tunnel their whole connection through the proxy, just their browser.<p>If their request IP doesn't match up with this IP, there's a very high chance that the order will is fraudulent.