From: Florian Weimer <fw@deneb.enyo.de>
To: Kevin Buhr <buhr@telus.net>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Stateless dropping of packets
Date: Wed, 02 Apr 2003 17:02:45 +0200 [thread overview]
Message-ID: <87wuidndre.fsf@deneb.enyo.de> (raw)
In-Reply-To: <87d6k5ltmo.fsf@saurus.asaurus.invalid> (Kevin Buhr's message of "01 Apr 2003 14:50:39 -0800")
Kevin Buhr <buhr@telus.net> writes:
>> Is it possible to drop packets, preferably using 2.4 iptables, before
>> the packet triggers updates of some caches (e.g. the route cache)?
>
> If you DROP the packet in a PREROUTING chain, that should work. Since
> the "filter" table doesn't have a PREROUTING chain, you need to use a
> table that does, like the "mangle" table. For example:
>
> iptables -t mangle -A PREROUTING -s 10.0.0.0/8 -j DROP
>
> should drop everything with a source in 10.0.0.0/8 without touching
> the routing cache.
It does, thanks a lot. *phew* Looks as if I don't have to try some
*BSD instead.
Is this extremely important application of the PREROUTING chain
documented somewhere? Should I feel embarrassed? 8-)
next prev parent reply other threads:[~2003-04-02 14:51 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-01 20:54 Stateless dropping of packets Florian Weimer
2003-04-01 22:50 ` Kevin Buhr
2003-04-02 15:02 ` Florian Weimer [this message]
2003-04-02 17:00 ` Kevin Buhr
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