Re: [tcpm] PoC for draft-moncaster-tcpm-rcv-cheat-02

"Anantha Ramaiah (ananth)" <ananth@cisco.com> Wed, 26 March 2008 20:03 UTC

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Thread-Topic: [tcpm] PoC for draft-moncaster-tcpm-rcv-cheat-02
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From: "Anantha Ramaiah (ananth)" <ananth@cisco.com>
To: "Caitlin Bestler" <Caitlin.Bestler@neterion.com>, "Rob Sherwood" <capveg@cs.umd.edu>, "Pekka Savola" <pekkas@netcore.fi>
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Cc: tcpm@ietf.org
Subject: Re: [tcpm] PoC for draft-moncaster-tcpm-rcv-cheat-02
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Ok the following a general comment/observation and just my opinion. 

There are a class of problems that CAN be solved in application layers,
but those solution doesn't scale ( all applications need to be fixed),
in such cases if we make minor tweaks in the transport layer with larger
benefits ( meaning a multitude of transport apps), and if the benefits
of doing so outweigh the drawbacks, then we should hoenstly pursue or
make an attempt to pursue it. In other words a rejection of a transport
proposal cannot be simply based on the fact that "you can possibly solve
this in application layer", wait a minute, I am also not advocating that
all applications problems need to be solved in transport layers.

Well, David Clark's quote on layering comes to mind as well.

S0.02,
-Anantha

> -----Original Message-----
> From: tcpm-bounces@ietf.org [mailto:tcpm-bounces@ietf.org] On 
> Behalf Of Caitlin Bestler
> Sent: Wednesday, March 26, 2008 12:41 PM
> To: Rob Sherwood; Pekka Savola
> Cc: tcpm@ietf.org
> Subject: Re: [tcpm] PoC for draft-moncaster-tcpm-rcv-cheat-02
> 
> > Rob Sherwood wrote
> > 
> > I contact vendors in 2005, and the response was luke warm 
> (as was the 
> > response on this list).  My take on this issue is that people are 
> > divided into three[1] camps:
> > 
> > a) people who do not believe this attack practical
> > b) people who believe the attack is practical, but not dangerous
> enough
> > 	to motivate patching TCP implementations
> 
> I'd rephrase that as:
> 
> b) people who believe the attack is practical, but that the 
> problem is an
>    application layer problem that should be solved at the 
> application layer
>  -- and especially not by transport layer solutions that would have a
>     negative impact on honest connections.
> 
> 
> 
> _______________________________________________
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> tcpm@ietf.org
> https://www.ietf.org/mailman/listinfo/tcpm
> 
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