Steve appears busy, and this is a pet topic of mine, so onward I spout...

On 15 Dec 99, at 8:52, Andrew Gordon wrote:

> On Tue, 14 Dec 1999, Steve Phillips wrote:
>
> > /me pats his 15 real-world ip addresses he uses over his ADSL connection
> > and grins at the less fortunate.
>
> OK, how are you doing that? At work we have 254 addresses (/24) that
> we would like to use over ADSL (currently using a 28.8 leased line :-( ).

It's called tunnelling. It's a very good solution for passing data between
two sites over a public network.

Basically, you encapsulate the original data stream into a second
datastream which is then passed through you gateway, along the
internet to a box at the destination. At the other end, the data is
unencapsulated and you have your original data stream. It's a bit like
putting a letter in an envelope and sending it along.

Steve is using GRE (Generic Routing Encapsulation). GRE allows a
network protocol to be transmitted over another network protocol by
encapsulating the packets of the first within the second.

PPTN=Point to Point Tunnelling Protocol - [can be used to create a
VPN] Mostly known as a MS protocol.

VPN=Virtual Private Network - uses encryption in the lower layers to
provide a secure connection through an otherwise insecure network,
typically the Internet.

--
Dan Langille - DVL Software Limited [I'm looking for more work]
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