> I have a very odd problem. I would appreciate it if someone was able to
> help me. If I do a tcpdump of packets on my local network here at home with
> my laptop, it works fine. But on the other hand, if I do a tcpdump of
> packets on the local network at school with my laptop, it doesn't always
> work. Sometimes it works if I wait awhile for the packets, but not always.
> For example. If I go "tcpdump -x -i eth0", it should do a dump of any
> packets on the network, right? If I do a ping to any machine at school it
> doesn't work all the time. It does work sometimes if I wait a really long
> time. What is going on, anyone have any clues?
At home I assume that you have a simple hub, were as at school you have a
switched network.
The difference is that a simple hub repeats all packets to all machines
connected to it, hence you can see any packets to any machine. A switch is
a piece of network kit that pickups which machines (by hardware address)
are connected to it and only sends packets to a machine to that machine.
This is both a security advantage and a speed advantage.
> As far as I know, there is no way the IS guys can stop me from doing a dump
> of packets to and from my machine!!! Am I mistaken?
Always assume that the admin knows more than you, (says he a school
network manger :)
--
Tim Fletcher .~.
/V\ L I N U X
[EMAIL PROTECTED] // \ >Don't fear the penguin<
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^^-^^
Linux, WinNT and MS-DOS. The Good, The Bad and The Ugly
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