[2985] in bugtraq

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Re: tcp

daemon@ATHENA.MIT.EDU (Vern Paxson)
Tue Jul 23 17:33:25 1996

Date: 	Tue, 23 Jul 1996 10:40:23 PDT
Reply-To: Bugtraq List <BUGTRAQ@netspace.org>
From: Vern Paxson <vern@ee.lbl.gov>
X-To:         be@system.sikkerhet.no
To: Multiple recipients of list BUGTRAQ <BUGTRAQ@netspace.org>
In-Reply-To:  Your message of Tue, 23 Jul 96 09:16:16 BST.

> What happends if you create a SYN packet which would initiate a tcp
> session, the first step in the handshake. Instead of only setting the
> SYN flag you also set the ACK flag.

You get a RST packet back, because the remote TCP doesn't have any state
for the connection presumed to exist by the presence of the ACK flag.

> Is it possible to create a connection state even with the ACK flag
> included??

No.

                Vern

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