Date   : Wed, 29 Jul 2009 11:08:50 +0100
From   : robert@... (Rob)
Subject: Econet <> Ethernet

On 29/07/2009, Phil Blundell <philb@...> wrote:
>
> Yup, PPTP would work for that as well.  But it's a much more complex
> protocol than RFC2003 and I don't think there's enough code space in the
> bridge unit to add PPTP in there.  So, for bridging multiple econets
> together across the Internet, we would either need to implement
> something simple along the lines of RFC2003 (and/or a UDP-based
> equivalent) or accept that the bridge is going to need to be front-ended
> by a PC of some kind.  The latter would be a bit of a shame though not
> the end of the world, I guess.

Certainly when using two gateways to talk to each other across the
'net, yes you need something that will be built in, I quite agree.
You certainly don't want to have to rely on a PC (or anything else: I
just set up pptpd on a router here, running OpenWRT, but it was hardly
end-user friendly...) for the actual connection...  pptp was just a
"what can *I* use *now*" idea, not having time to, or wishing to,
re-invent any wheels...

We used to use some 'firebrick' firewall/routers at work that used
what on reflection is probably RFC2003 or a varient thereof to set up
a vpn across the 'net.  I think it used udp, port 1, but might be
mistaken about that.  Certainly the description of how it worked was
similar in that it just added a new ip header to the front of the
existing packets.   If you want to test inter-operability, I can find
one of those..

Rob