OFFLIST: Re: [LINK] RFI: MACs and PPP
dlochrin at dot.net.au
Wed Nov 10 09:17:10 EST 2004
Are you concerned about the privacy aspect re identifying a particular system, or is authentication the objective? If you're still interested in the subject I can go on.
On Tue, 9 Nov 2004 11:15, Roger Clarke wrote:
> A dumb question about the Link Layer of the Internet Protocol Suite.
> In a LAN, the physical connection between a device and the
> communications channel is identified by a MAC (media access control)
> address, e.g. an Ethernet NICId (network interface card identifier).
> With a dial-up connection, on the other hand, there's a 1-to-1,
> point-to-point connection rather than a 1-to-many LAN arrangement.
> So a MAC is redundant - if you stuff the data down the line, it ends
> up where it was meant to, because there's simply nowhere else for it
> to go.
> The question: is there any such concept as a MAC for the modem port
> of a device? If not, is there any reliable identifier of the machine
> on a dial-up connection?
> (The IP-address is of course the address that the machine is at, as
> known by the Network Layer; it's not an identifier for the machine
> that's sitting there at the time. The logs contain information about
> the IP-address and the date-and-time; but nothing about which
> machine was using the modem at that time).
+61 2 9363 1094
For PGP public key, send mail
to: pgp-public-keys at keys.pgp.net
subject: GET David Lochrin
More information about the Link