How to find out device name (ADSL modem connected via Ethernet) in Linux/Ubuntu? The name is required for using tcpdump, the connection is active and was created in UI.
migrated from serverfault.com Feb 6 '12 at 19:06
That depends: if you are using PPPoE, it will be
If you are using NAT, or direct IP, it will just be the
The easiest way to figure out the device is probably run
In my example, my default route is via