netdev - Re: Passive OS fingerprint xtables match (iptables part)

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Date:	Fri, 13 Feb 2009 16:12:56 +0300
From:	Evgeniy Polyakov <zbr@...emap.net>
To:	Jan Engelhardt <jengelh@...ozas.de>
Cc:	Patrick McHardy <kaber@...sh.net>, netdev@...r.kernel.org,
	David Miller <davem@...emloft.net>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Netfilter Development Mailinglist 
	<netfilter-devel@...r.kernel.org>
Subject: Re: Passive OS fingerprint xtables match (iptables part)

On Fri, Feb 13, 2009 at 02:03:10PM +0100, Jan Engelhardt (jengelh@...ozas.de) wrote:
> >> >	printf("OS fingerprint match options:\n"
> >> >		"--genre [!] string	Match a OS genre by passive fingerprinting.\n"
> >> 
> >> The syntax should be  [!] --genre string, that is what most
> >> others use. Then the check_inverse call also be removed.
> >
> >Actually not, it has genre not Linux (Windows, Solaris, HPUX and so on).
> 
> It may not coincide with English grammar, but it is easier to parse.

'! --genre Linux' means this option was not specified,
'--genre ! Linux' means everything but Linux.

-- 
	Evgeniy Polyakov
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