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Francois Labreque nous illumina en ce 2008-09-20 14:45 -->
> Tom Austin a écrit :
>> Orchid XP v8 wrote:
>>>>> The Internet gateway is a Cisco router. I don't have the password -
>>>>> and frankly, if I did I wouldn't know what to do with it.
>>>>
>>>>
>>>> How many physical connections from your internal network to your
>>>> internet gateway - the Cisco router?
>>>
>>> Just one.
>>>
>>
>> Get an old hub and put on the line.
>>
>> then run a patch from hub to a computer running a packet sniffer
>>
>>
>>
>>
>> current hookup
>>
>> SWITCH-----------------------CISCO ROUTER
>>
>>
>> sniffer hookup
>>
>> SWITCH------------HUB------------CISCO ROUTER
>> !
>> !
>> SNIFFER
>>
>>
>>
>
> Be sure to put a cross-over cable between the hub and the switch!
>
> This being said, unless Andrew doesn't care about his job, I wouldn't
> recommend playing around with the network like that.
>
> Problem 1: Both the switch and router are probably set to full duplex.
> If the sniffer or hub sends packets, it may cause collisions that
> would look very suspicious on a full duplex link (I'm assuming that one
> of the reasons to go to Cisco hardware 2 years ago was for remote
> management)
>
> Problem 2: If they are serious about security, the switch will be
> configured to allow only one mac address (the router's) and any packet
> transmitted by the sniffer PC or hub would cause the port to alarm or
> shutdown.
>
> Problem 3: the unpluging of the router and connection to the hub might
> be enough to send an alert to the Powers-That-Be(tm).
>
> Chances are they already have network usage stats anyway.
>
Normaly, when you use a hub, switch or router, you don't need a crossover cable.
The crossover is done by the hub/switch/router. Crossover cables are used to
dirrectly connect 2 computer by an ethernet cable.
--
Alain
-------------------------------------------------
You know you have been raytracing for too long when the animation you render
will be finished after yourself.
Urs Holzer
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