[prev in list] [next in list] [prev in thread] [next in thread] 

List:       freebsd-security
Subject:    Re: mapping arp
From:       Peter Pentchev <roam () orbitel ! bg>
Date:       2001-01-30 11:09:03
[Download RAW message or body]

On Mon, Jan 29, 2001 at 09:14:27PM -0600, disassembled wrote:
> 
> I was wondering if there was anyway i could map an mac address back
> to it's assigned IP address without using a rarpd.
> 
> something i was considering writing was using writing a program 
> that sent out a series of arp who-has packets to the network
> then run a cmp on the 48-bit values that returned in the 
> replies against some mac address that would be supplied on the 
> command line.
> 
> if anyone knows anything about that & could help me out;
> i would be greatful.

<ANSWER TYPE="obvious,stupid" PRIORITY="next to useless">
If your system has already seen IP traffic from the machine in question,
you should have its address in the kernel's ARP cache.  arp -an should
display it, or you could query it the way arp(1) does.
</ANSWER>

G'luck,
Peter

-- 
I am the thought you are now thinking.


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-security" in the body of the message

[prev in list] [next in list] [prev in thread] [next in thread]