netdev - Re: [PATCH 1/1] netfilter: xt_recent: Add optional mask option for xt

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Date:	Thu, 12 Apr 2012 01:14:21 +0200
From:	Pablo Neira Ayuso <pablo@...filter.org>
To:	Denys Fedoryshchenko <denys@...p.net.lb>
Cc:	Patrick McHardy <kaber@...sh.net>,
	"David S. Miller" <davem@...emloft.net>,
	netfilter-devel@...r.kernel.org, netfilter@...r.kernel.org,
	coreteam@...filter.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH 1/1] netfilter: xt_recent: Add optional mask option for
 xt_recent

Hi Denys,

On Tue, Mar 06, 2012 at 01:24:44PM +0200, Denys Fedoryshchenko wrote:
> Use case for this feature:
> 1)In some occasions if you need to allow,block,match specific subnet.
> 2)I can use recent as a trigger when netfilter rule matches, with mask 0.0.0.0
> 
> Example:
> 
> If you ping 8.8.8.8, after that you can't ping 2.2.2.10

Could you provide an useful example for this new feature?

I also think you can make this with hashlimit, that allows you to
set the network mask.
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