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SubjectRe: Ethernet Error Correction
On Tue, Oct 02, 2001 at 11:48:01AM +0200, Pavel Machek wrote:
> Hi!
> > > > Also, generic PROMISC mode still drops off received frames
> > > > with CRC error.
> > >
> > > Hmm, sounds good. Someone should create tool for communication over
> > > ethernet with broken crc's. Such communication would be stealth from
> > > normal tcpdump. Do it on your provider's network to escape accounting ;^)
> >
> > But still you'll see the number of errors on your eth card
> > skyrocketing, so you'd grow quite suspicious.
> Yep, but it would be _very_ hard for you to find the cause. You'd
> probably chase ghosts trying to replace cables, etc, never finding
> what happens.

Well, if you checked all the cables, you'd most likely find the device
capable of sending the bad CRC frames. Also, if you use a switch (not ha
hub or coax), it won't work at all.

Vojtech Pavlik
SuSE Labs
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