finding mac address of a machine on local network
 

i want to know mac address of a particular ip but the problem is that i am unable to ping that ip but that ip is being used by someone in my local network that i know from my proxy logs. i want to know the mac address of that ip, any one knows

Hi,

You can use arp:
Regards

thanks

when i executed the command for the first time i got this reply
? (200.200.200.199) at <incomplete> on eth2
when i executed for the second time i got this reply
arp: in 38 entries no match found.
but i didn't find the reply i was looking for

The ARP cache is short lived; you may be able to refresh it by pinging the IP address you want the MAC for.

If you can't ping it you would have to send some data against it that it would return. A telnet ssh or http. If none then you need to wireshark it. As above arp is very short lived.