![]() ![]() ![]() 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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