From: none@nonelandia.com
Thanks, device reset means loossing device configuration, no serial port
available.
I will try to use a ethernet cable-modem in order to connect, since a switch
may filter some broadcastings.
What I am looking for, is some sort of inverse ARP protocol. So, I would
like to findin device MAC ant then ask it for it's IP address.
Thanks.
"glen herrmannsfeldt" escribió en el mensaje
news:ht3v2s$vf7$1@speranza.aioe.org...
> CENTRINO wrote:
>> I have a TCP-IP device previously configured with an unknown TCP address,
>> I
>> have user and password to manage it.
>
>> So I need to find out wich address was configured in order to configure
>> my
>> leaptop in the same subnet than the device and telnet it. I will connect
>> them side by side with a 4 port switch, I suppose, that the device
>> broadcasts somehow its addres.
>
> Many have a hardware reset that will reset to a factory address.
> (Like hold the reset button for 15 seconds, or hold it while
> powering on.)
>
>> Would it be possible to get the device addres with some kind of tcp
>> sniffer,
>> given the fact that I will most surely configure leaptop with a tcp
>> address
>> in a different subnet range than the device ?
>
> It isn't always easy. The device might not send at all unless data
> is coming in. You can try a sniffer, though. Sometimes there is
> a serial port, or other non-TCP way to get the address.
>
>> So, in short, how can I "see" tcp addresses hooked in an given
>> ethernet segment?
>
> A sniffer will do, in addition to the problem that an ethernet
> switch might not forward it to you.
>
> -- glen
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