Here is a MAC address example: 00: 1B: 44: 11: 3A: B7. The MAC serial number consists of six groups of two characters separated by colons. It is actually used for information exchange between computers on the local network. While the IP address is logical and it can be changed by the network administrator, the MAC address is on the hardware and it is permanent. The MAC address is registered on the network card when it is created in the factory. MAC ID (Media Access Control) is a unique digital number assigned to each computer on the network, more precisely not to a computer, but to a network card. This was tested using a machine booted from a live DVD ( linux mint 20.Free Download What does MAC address stand for? Your linux machine does not need to be a dedicated box. Once you have the MAC address, you can just unplug this machine and plug in the next machine you want the address of.
One is the same as you see on the interface you're listening on (in this case, wlp63s0 = 78:ac:c0:95:99:02 ) the other is the address you're looking for (in this case, 00:15:b7:9c:12:e9) Tcpdump: verbose output suppressed, use -v or -vv for full protocol decode (with enp63s0 being replaced with the ethernet port name you got from the 'ip' output) sudo tcpdump -i enp63s0 arp or port bootps sudo tcpdump -i enp63s0 arp or port bootps The next line starts up tcpdump to listen for arp or bootp (DHCP) packets. If you are on a laptop you are also likely to see a wireless interface, often starting it's name with a name with a 'wl' Lo (localhost interface 'lo' which should be ignored), and the ethernet interface - in this case enp63s0. Then run the command ip link show ip link showġ: lo: mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
(You can also connect them through a small switch, but the switch should not be connected to the rest of your network). Start up a linux box, and plug it and your mystery machine back to back with ethernet.
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