How to get uuid or mac address from client in Java?

Question

I\'m looking for a solution for a Java based webapplication to uniquely identify the client. The server is in the same network as the clients and I thought that using the MA

Answer 1

The best I could find is this: Query ARP cache to get MAC ID

And the potted summary is that:

• there is no standard Java API,
• there is no operating system independent solution,
• your application typically needs to be privileged (e.g. root access) to query the host's ARP cache, and
• if the packets go through a network router, you won't be able to identify the source MAC address anymore.

I don't think this is a good approach for identifying your user's machine.

Consider also that:

• This only identifies the machine, not the user. Some computers are shared by multiple users.
• MAC addresses can be changed too.