From owner-freebsd-security  Sat Nov 25 00:45:39 1995
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To: Michael Smith <msmith@atrad.adelaide.edu.au>
cc: stesin@elvisti.kiev.ua (Andrew V. Stesin), jkh@time.cdrom.com,
        security@freebsd.org
Subject: Re: I wonder how much trouble something like this would be to do? :) 
In-reply-to: Your message of "Sat, 25 Nov 1995 02:41:08 GMT."
             <199511250241.CAA02783@genesis.atrad.adelaide.edu.au> 
Date: Sat, 25 Nov 1995 00:18:49 -0800
From: Paul Traina <pst@shockwave.com>
Sender: owner-security@freebsd.org
Precedence: bulk

  It uses the tun device, and raw IP sockets for its transport. (What's
  the point of wrapping IP in TCP? IP is unreliable anyway 8))

There are advantages if you're running a stream cypher protocol like RC4.