Re: Dynamic IP hack (PR#294)

Chris Wedgwood (chris@cybernet.co.nz)
Tue, 20 Oct 1998 15:26:34 +1300


On Tue, Oct 20, 1998 at 04:05:58AM +0100, Alan Cox wrote:

> And if you cycle through the new address back to the old in under
> 120 seconds you violate the time wait requirements of the tcp
> protocol

Why don't we just declare this `the provider fault'?

ie. if they don't specifiy a large enough address pool so that
frequent address reuse occurs, or if the address pool selection
algorithm is broken, then bad things can happen and its not our
fault.

with the above you can get someone else's data anyhow, ie. the
start pulling down their mail, their connection dies and they go
away, you connect and tcp starts sending you some stuff.. you get
one or two packets maybe, more if you want to do clever tricks.

(yes, normally these packets will generate RST resposes, but that
doesn't havw to be the way)

-cw

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