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Date: Thu, 29 May 2008 10:01:29 +0200
From: Andre Oppermann <andre@freebsd.org>
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To: Victor Hugo Bilouro <bilouro@bilouro.com>
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Cc: net@freebsd.org
Subject: Re: establish connection without tcp options
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Victor Hugo Bilouro wrote:
> Hi all,
> 
> I'm working into establish manually a tcp connection.
> 
> Does anyone knows if freebsd 7.0 stable agree, a connection
> establishment without  TCP options set?

Yes, certainly it does.  If you send a SYN w/o any options it
won't use any.  If you establish a connection from FreeBSD you
may ignore any options in SYN and in your SYN-ACK not send any.
If you want FreeBSD not to send any options you can set the
socket option TCP_NOOPT before you do the connect.

-- 
Andre