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Date: Tue, 8 Jan 2002 13:54:22 -0600
To: Matthew Emmerton <matt@gsicomp.on.ca>
From: Lucas Bergman <lucas@slb.to>
Cc: Jan Knepper <jan@digitaldaemon.com>,
	FreeBSD Questions <FreeBSD-Questions@FreeBSD.ORG>
Subject: Re: Detecting IP addresses on ONE system.
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[ Format recovered: top-post ]

> > > I wondered if there is a way to detect from the outside how many
> > > IP address assignments a system has.
> >
> > It's not really clear (to me) what you mean here.  An answer to
> > your question might be: It is not possible, in general, to tell if
> > two given IP addresses are assigned to the same physical computer.
>
> If you're on the same LAN as this system, arp will tell you the MAC
> address associated with each IP.  If the MAC addresses are the same,
> then they IPs are on the same card (hence same system).

Right.  However, the case where that sort of information is available
is specifically excluded: The OP asks about detecting IP
``assignments'' from ``the outside.''  I stand by my answer, that no
*general* way to do what (I think) the OP asked exists.

Lucas


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