MAC addresses in JavaScript

Question

I know that we can get the MAC address of a user via IE (ActiveX objects).

Is there a way to obtain a user\'s MAC address using JavaScript?

Answer 1

No you cannot get the MAC address in JavaScript, mainly because the MAC address uniquely identifies the running computer so it would be a security vulnerability.

Now if all you need is a unique identifier, I suggest you create one yourself using some cryptographic algorithm and store it in a cookie.

If you really need to know the MAC address of the computer AND you are developing for internal applications, then I suggest you use an external component to do that: ActiveX for IE, XPCOM for Firefox (installed as an extension).