linux-kernel - Re: [RFD] iptables: mangle table obsoletes filter table

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Message-ID: <470F7555.4090500@trash.net>
Date:	Fri, 12 Oct 2007 15:23:33 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Al Boldi <a1426z@...ab.com>
CC:	netfilter-devel@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFD] iptables:  mangle table obsoletes filter table

Al Boldi wrote:
> Patrick McHardy wrote:
> 
>>Al Boldi wrote:
>>
>>>Well, for example to stop any transient packets being forwarded.  You
>>>could probably hack around this using mark's, but you can't stop the
>>>implied route lookup, unless you stop it in prerouting.
>>
>>This also works fine in FORWARD with a little extra overhead.
>>If you really have to save resources, you should use PREROUTING/raw
>>to also avoid the creation of a connection tracking entry.
> 
> 
> Yes sure, if you use nat.

Conntrack.

> But can you see how forcing people into splitting 
> their rules across tables adds complexity.  And without ipt_REJECT patch, 
> they can't even use REJECT in prerouting, which forces them to do some 
> strange hacks.
> 
> IMHO, we should make things as easily configurable as possible, and as things 
> stand right now, the filter-table is completely useless for 99% of 
> use-cases.

Sure, as I said, patches to remove the arbitary restrictions to
tables are welcome, but please do this for all targets and
matches which allow this, not only REJECT. And if you include a
seperate (tested) patch for the IPv4 and IPv6 REJECT targets
I'll consider it as well.
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