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From: ROODE%BIONET@SUMEX-AIM.STANFORD.EDU.UUCP
Newsgroups: mod.protocols.tcp-ip
Subject: Re: Ethernet Security
Message-ID: <12280226590.15.ROODE@BIONET-20>
Date: Thu, 19-Feb-87 03:19:23 EST
Article-I.D.: BIONET-2.12280226590.15.ROODE
Posted: Thu Feb 19 03:19:23 1987
Date-Received: Fri, 20-Feb-87 06:37:52 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
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Approved: tcp-ip@sri-nic.arpa

The Bridges aren't irrelevant in the extent that even as they
may sound elegant in the sense of permitting geographical
growth to occur transparently, they do so at the expense
of the administrative controls normally associable with a physical
ethernet (as few as those may be).

If the gateways were of a less transparent variety, some
additional protection against impersonation would be provided.
If the gateways are sensitive to the identity of the sender
of the packets they are routing, and you trust your gateways,
you have some idea of at least the physical ethernet  on which
packets originate.
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