How to find the ip of a mac-address

[John Summerfield]

Daniel Challen wrote:
> On Mon, 2006-03-13 at 12:40 +0000, Dan Track wrote:
> 
>>Hi
>>
>>I've got the mac-address of desktop. But I don't know it's IP, are
>>there any tools that I can use to find this IP.
> 
> 
> Presuming you're on the same LAN, and the desktop is not running Windows
> (which does not respond to the broadcast address):

Linux can be configured to not repond to broadcast pings, and windows 
can be configured to respond to the,;-\

>   ping -b 192.168.0.255      (substitute with your broadcast address)
>   /sbin/arp -a | grep 00:10:00:FF:FF:FF		(substitute with the MAC
> address of the desktop) 
> 
> Failing that, you can watch network traffic and hope the desktop machine
> generates some traffic:
>   tcpdump -v ether host 00:10:00:FF:FF:FF

If you're using DHCP, then check the DHCP server's logs.

You can also use a shell script (or a small series of commands) to ping 
all likely addresses (google should find some sample bash scripts for 
you) and see what arp says.

nmap also has the ability to ping a range of IP addresses, and scanning 
your local LAN for http servers would be quick (but less educational 
than the scripting approach) and create the needed ARP entries.



-- 

Cheers
John

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