Re: is it rational to close the 139 port
On Sun, 22 Jul 2012 11:32:58 +0200
Pascal Hambourg <pascal@plouf.fr.eu.org> wrote:
> Joe a écrit :
> >
> > All network communication is actually based on MAC addresses
>
> No. Communication over an ethernet network is, but not all network
> communication is.
>
>
I realise that, but there are only so many levels of complexity which
are worth introducing at once. The more 'buts' and 'excepts' in an
explanation, the harder it is to follow.
The point being made was that MAC addresses cannot be concealed, which
is valid wherever MAC addresses exist. The issue does not arise in
those interfaces which don't use Ethernet at the PC, such as DSL modems
and cellphone dongles and virtual interfaces like VPNs, nor away from
the PC across routers into other broadcast domains. But a computer
within a local network will communicate entirely by Ethernet, either
wired or wireless.
--
Joe
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