Re: TCP: a practical question

Hi Ashley - 

I remember Dan Kaminsky talking about implementing this with Anyron at
CodeCon 2002, I'm not sure if it ever saw the light of day, though...

http://www.codecon.org/2002/program.html#gateway

John

On Thu, Jan 17, 2008 at 04:55:56PM -0500, snort user wrote:
> Greetings.
> 
> Normally TCP connection establishment is a three packet sequence.
> 
> C -> S (Syn)
> S -> C (Syn|Ack)
> C -> S (Ack)
> 
> TCP specification (rfc 793) mentions about a simultaneous open and
> it's use in distributed set ups.
> In this case the handshake would proceed as follows:
> 
> C -> S (Syn) .. 1
> S -> C (Syn) .. 2
> (1 and 2 happends almost simultaneously)
> C -> S (Syn|Ack)
> S -> C (Syn|Ack)
> 
> My question is do we see this behavior in the practical world ?
> 
> Thanks
> Ashley
> 
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