Re: [PATCH 1/2] netfilter: add extended accounting infrastructure over nfnetlink

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On Wed, Dec 14, 2011 at 02:43:40PM +0100, Jan Engelhardt wrote:
> On Wednesday 2011-12-14 12:00, pablo@xxxxxxxxxxxxx wrote:
> 
> >Then, you can use one of this accounting objects in several iptables
> >rules using the new NFACCT target (which comes in a follow-up patch):
> >
> > # iptables -I INPUT -p tcp --sport 80 -j NFACCT --nfacct-name http-traffic
> > # iptables -I OUTPUT -p tcp --dport 80 -j NFACCT --nfacct-name http-traffic
> >
> >The idea is simple: if one packet matches the rule, the NFACCT target
> >updates the counters.
> 
> This smells a lot like -m quota2 --grow, except that yours uses 
> netlink instead of procfs and can only update the counters.
> 
> I suggest to turn -j NFACCT into -m nfacct instead, so that we can add 
> counting-down mode and matching capabilities, so as to replace 
> xt_quota*.

This makes sense.

My only concern is that -m nfacct will not really match anything (not
by default at least).

But with -m nfacct, we can use it in one single multi-match rule, which
comes in handy.
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