Is it possible to get the visitor's mac address in rails?

问题

Is there any function that gets the user's MAC address so I can record it as some authentication credential?

回答1:

No.

Once you involve a layer 3 router, the original MAC address is no longer available / relevant.

来源：https://stackoverflow.com/questions/17516669/is-it-possible-to-get-the-visitors-mac-address-in-rails