JP M wrote:

>From:	"Peter Allgeyer" <allgeyer at web dot de>
>To:	"Kris Maglione" <bsdaemon at comcast dot net>
>CC:	m0n0wall at lists dot m0n0 dot ch
>Date:	 Sun, 18 Sep 2005 11:26:47 +0200
>Subject:	 Re: [m0n0wall] OpenVPN, switching to m0n0
>
>....
>BTW: Is an "Ethernet tunnel" a useful scenario on a
>gateway?
>
>=> Yes, I think it is. The tunnel must use either tun
>or tap at both ends. Client drivers have an impact. If
>I remember right, mac OS X prior to 10.3 can't use
>tap; windows can't do tun. 
>  
>
I can't attest to the Macs, but I believe that the windows TAP driver 
supports tun mode... Actually, I'm sure of it.