From mboxrd@z Thu Jan  1 00:00:00 1970
From: Antony Stone <Antony@Soft-Solutions.co.uk>
Subject: Re: detection of the third tcp packet in a tcp connection setup
Date: Thu, 27 Jun 2002 21:06:54 +0100
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On Thursday 27 June 2002 8:57 pm, Ramin Alidousti wrote:

> If I'm not wrong you can always send data even in SYN and SYN/ACK.
> Like Patrick said the default options in the socket interface might
> not do it but I thought I saw some tweaking in one of Richard Steven's
> (god bless his soul) books to push traffic in SYN packets.

Is that an interesting way to get round packet filtering firewalls ?

Send enough data (eg an http request) in a SYN packet so that the application 
does the dirty work for you, even if the packet filter isn't going to allow 
the connection to get ESTABLISHED ?

Or do you have to fiddle with the receiving socket too in order for it to 
cope with this ?

 

Antony.