From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pablo Neira Ayuso <pablo@netfilter.org>
Subject: Re: [PATCH iptables]  xt_socket: add --nowildcard flag
Date: Tue, 25 Jun 2013 02:58:05 +0200
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Cc: netdev <netdev@vger.kernel.org>, netfilter-devel@vger.kernel.org,
	Jesper Dangaard Brouer <brouer@redhat.com>,
	Patrick McHardy <kaber@trash.net>
To: Eric Dumazet <eric.dumazet@gmail.com>
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On Thu, Jun 20, 2013 at 05:52:35AM -0700, Eric Dumazet wrote:
> From: Eric Dumazet <edumazet@google.com>
> 
> xt_socket module can be a nice replacement to conntrack module
> in some cases (SYN filtering for example)
> 
> But it lacks the ability to match the 3rd packet of TCP
> handshake (ACK coming from the client).
> 
> Add a XT_SOCKET_NOWILDCARD flag to disable the wildcard mechanism
> 
> The wildcard is the legacy socket match behavior, that ignores
> LISTEN sockets bound to INADDR_ANY (or ipv6 equivalent)
> 
> iptables -I INPUT -p tcp --syn -j SYN_CHAIN
> iptables -I INPUT -m socket -j ACCEPT

I have enqueued this patch to iptables-next, thanks!