From: Aleksandar Milivojevic <amilivojevic@pbl.ca>
To: netfilter@lists.netfilter.org
Subject: Re: how to stop broadcasts using iptables
Date: Tue, 27 Apr 2004 09:56:51 -0500 [thread overview]
Message-ID: <408E74B3.6000906@pbl.ca> (raw)
In-Reply-To: <20040427131900.JCWU23570.viefep19-int.chello.at@localhost>
sschlesi@chello.at wrote:
> my policies are set to -P FORWARD ACCEPT because its just an simple ethernet router, w/o nat and stuff.
> so i thought iptables'll also forward broadcasts from one net to the other.
No. Netfilter is not going to forward them all-by-itself. The packet
will end up in FORWARD chain only if the kernel decides it needs to
route it from one interface to another. So, if your kernel is not
routing broadcast packets (it shouldn't by default), you will not see
them in FORWARD chain.
--
Aleksandar Milivojevic <amilivojevic@pbl.ca> Pollard Banknote Limited
Systems Administrator 1499 Buffalo Place
Tel: (204) 474-2323 ext 276 Winnipeg, MB R3T 1L7
next prev parent reply other threads:[~2004-04-27 14:56 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-27 13:19 how to stop broadcasts using iptables sschlesi
2004-04-27 14:56 ` Aleksandar Milivojevic [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-04-27 12:35 sschlesi
2004-04-27 12:50 ` David Cannings
2004-04-28 0:11 ` Alexander Samad
2004-04-27 14:46 ` Aleksandar Milivojevic
2004-04-27 15:40 ` Angel j Alvarez
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