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Re: [K12OSN] Tuning LTSP Performance

Robert Arkiletian wrote:
On Fri, Aug 29, 2008 at 8:23 PM, Almquist Burke
<balmquist mindfirestudios com> wrote:
ARP poisoning? All they need is access to the network on a machine with raw
socket capabilities.

Okay basically MAC spoofing eth0 on the server. But if they do this
won't it kill all the X sessions running on the clients? Plus won't
the switch get confused as to which port to send the data to since it
will now have 2 ports claiming the same MAC address?

Yeah, it could kill the X sessions, but the switch itself likely won't get confused. It'll simply use the last entry that was made in the CAM table, assuming that it has enough CPU to keep its CAM tables updated fast enough (two boxes saying, "aa-bb-cc-dd-ee-ff is over here!" "Oops, aa-bb-cc-dd-ee-ff is over *here* now!" and so on). Remember that bridges are not very complicated; the logic's pretty simple.

What *will* get confused is any X11 sessions that are expecting certain packets to arrive, and those packets don't, and that's how the sessions get degraded, then killed.


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