Re: I-D ACTION:draft-nordmark-multi6dt-shim-00.txt

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On 2004-11-03, at 22.55, Geoff Huston wrote:

> At 06:11 PM 3/11/2004, Kurt Erik Lindqvist wrote:
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>> On 2004-11-03, at 01.28, Erik Nordmark wrote:
>>
>> > If a host wants to prevent packet injection attacks today (such as
>> > spoofed RCP RST packets, if it wants to prevent it from all nodes 
>> and
>> > not depend on ingress filtering, wouldn't it use IPsec?
>>
>> That would have to be a must. I can't see anyone building a trust 
>> model
>> based on (the non-existing) ingress filtering. That said, I think most
>> protection against packet injection attacks on todays Internet is
>> actually left to ULPs.
>
> I take it that you are classifying TCP as a ULP in this instance?

Yes.

> As I understand it TCP attempts to provide protection against packet 
> injection attacks and does not allow its ULP any discretion,
> while UDP simply passes the packet upward and places the onus on its 
> ULP to detect injected bogus packets in the UDP exchange.

Agreed. I simply meant "something above IP" with ULP...

- - kurtis -

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