finding MAC address from a remote computer using a private IP

Question

I want to know the MAC address of a device from a remote computer. I also want to know the security threats if somebody knows my MAC address?

Solution 1

I want to know the MAC address of a device from a remote computer.

Log into that remove computer and use 'arp -a' or log into the local switch and issue its command to display ARP values (the command varies per brand and per model).

I also want to know the security threats if somebody knows my MAC address?

There is no security threat if someone knows your MAC. MACs are used locally only.

Noone who is not on the same local network (read: in most cases none who is not in your home plugged into the same switch or connected to the same wireless network) can do anything with it.

Solution 2

use

arp -a 192.168.0.1

or whatever is the IP of the machine that needs to be traced

Comments

[JdeBP]

The question about security threats is actually a fairly long answer if answered correctly. It's better off as a separate question.