[MLB-WIRELESS] another stupid q, about dhcp

[Will Lotto]

what's stopping them statically assigning an IP to themselves?

Even if an IP is assigned to another device you can manually assign
that IP to your computer, then wait for that device to be switched off
(say, someone's laptop or something)... or, you can just sniff the
traffic on the link, and give yourself a random IP within the active
scope.


> so then it is possible to stop people "hacking" into networks

> right?


> ----- Original Message -----
> From: "Tony Langdon, VK3JED" <vk3jed at optushome.com.au>
> To: "rick" <mibz at optushome.com.au>; <melbwireless at wireless.org.au>
> Sent: Wednesday, April 03, 2002 7:37 PM
> Subject: Re: [MLB-WIRELESS] another stupid q, about dhcp


>> At 07:31 PM 3/04/2002 +1000, rick wrote:
>>
>> >ok with dhcp you can assign ip addresses to mac addresses right?
>> >
>> >ie f45a4aa62 = 10.10.12.1
>> >
>> >what if you have 5 comps on teh network and then to stop peopel comeing
> on
>> >could you do
>> >
>> >aaaaaaaa = 10.10.12.7-255
>> >
>> >can you force that if you dont have X mac address you cant get X ip?>
>>
>> With Linux you can - don't configure any dynamic ranges, and tie each IP
>> down with a host declaration.  In NT/win2k, you could try reserving all
>> your IP addresses to specific MAC addresses, so there's none free for
>> anyone else.  You can define the scope bigger than you need, fill in the
>> reservations, then exclude the rest of the range.
>>
>> 73 de Tony, VK3JED
>> http://vk3jed.vk.irlp.net
>>


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