is this legal: can still ping eth1 through eth0, even if eth1 cable is unplugged
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Routing, network cards, OSI, etc. Anything is fair game.
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Yes. You can ping any internal network interface as long as it is are up; that is, enabled in the kernel device table and able to receive packets as is the case from the same system in which they exist.
No it is not legal, I would check out the window to see if there are
any helicopters or strange vans with large antennae.
pack a suitcase, leave by the back door and go to the bus stop.
Someone will meet you there wearing a top hat, the password is "the fish are very blue this season"
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