Mark Harloff wrote:
My lan network consists of the following:
Speedstream ADSL modem - Linksys BEFSX41 Router - Linksys 8 port
switch - 8 computers.
I would like to be able to use Ethereal (running on an XP machine off
the switch) to record All activity on the lan from the modem in (and
outbound, including the router itself.
Is there a way to accomplish that using Ethereal ?
AFAIK, the traffic between the modem and the router is plain Ethernet
traffic, using the PPPoE protocol (usually, at least).
So it's not really a question if Ethereal can do that (it should be able
to dissect PPPoE, but I've never done that myself), but how to get the
data into your computer (you'll have the same problems with other
analyzers as well...). You'll need to cut the line between the modem and
the router and "plug" your computer with the analyzer on it between them:
modem - (analyzer) - router - switch - computers
For a detailed description of that problem (and the known solutions),
see: http://wiki.ethereal.com/CaptureSetup/Ethernet
Adding a hub between the modem and the router should do well, even an
old 10MBit hub should do (but don't try to use a switch for this, as you
won't see anything!).
Regards, ULFL
