[mnet-devel] Grid Of Trust -- pre-design

[Jim Dixon]

On Tue, 9 Dec 2003, [iso-8859-1] Some Guy wrote:


> > I think that you are probably trying to describe a standard service, a
> > channelized circuit.  In Europe a 2M E1 will be sliced into 32 64K
> > channels, which can be assembled into higher speed services, say one
> > 128K circuit, two 64Ks, one 512K, and one 1M.  If you like you can run
> > data over some circuits and voice over some others.  Is this what you
> > are talking about?
>
> Right.  Companies in the old days would lease actual independent
> physical lines.  The companies selling these lines figuared out that
> they could run them on top of other physical networks.  So we might
> sell 100 lines from London to Paris, but they might just go across one
> fiber for most of the journey.  Now if two nodes in a P2P network
> could contact their ISP(s) and request a fixed bandwidth connection
> between each other, they could set it up to where these connections
> ran independently of normal Internet access.

You are describing a service which has been available for decades.  This
is how leased lines work.  When you get a leased line, this is what you
get.  It's not cheap.

> > > > Where do the IP addresses come from?  And why can't the bad guys just DOS
> > > > the entire lot?  There are techniques for doing this that require very
> > > > little bandwidth.
> > >
> > > The bad guys won't know more than 1 of the IPs of the super node.
> > > Each super node talks to each other one over just 1 of its IPs.
> >
> > But where do the IP addresses come from?
>
> Each of my quake buddies has an internet connection at home where he
> runs his sub-node.  We can all trust each other.  If they know one of
> our IPs because one of our neighbors was a spy, they can flood him.
> That shouldn't stop us from servicing our other neighbors.

I think that you fail to understand how Internet routing works.

Your subnode is going to have one (1) IP address.  You can hang up to 64K
friends off of it in private IP address space, each on his own port, but
they will all be sharing that same IP address in the global IP address
space.  When someone decides to zap that IP address, you are all toast.

--
Jim Dixon  jdd at dixons.org   tel +44 117 982 0786  mobile +44 797 373 7881
http://jxcl.sourceforge.net                       Java unit test coverage
http://xlattice.sourceforge.net         p2p communications infrastructure



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