From: Tom Eastep <teastep@shorewall.net>
To: Rodolfo Siviero Stein <rstein@persogo.com.br>
Cc: netfilter@lists.netfilter.org
Subject: Re: Strange Problem - IPTables or Hardware related ????
Date: Mon, 21 Oct 2002 07:07:09 -0700 [thread overview]
Message-ID: <3DB40A0D.4090302@shorewall.net> (raw)
In-Reply-To: 5.1.1.6.0.20021018113106.00a91488@webmail.persogo.com.br
Rodolfo Siviero Stein wrote:
>
> Anyone had a problem like this ? Any comments ? Is this hardware
> related or software ?
>
Do you have multiple NICs cabled to the same HUB/switch? In my experience,
when people see packets arriving on unexpected interfaces, that is the
cause. The manner in which the Linux kernel handles ARP "who-has" requests
makes this type of configuration unsuitable for firewalling since any
interface connected to the HUB/switch can respond to "who-has" requests
for any of the addresses assigned to one of those NICs.
-Tom
--
Tom Eastep \ Shorewall - iptables made easy
AIM: tmeastep \ http://www.shorewall.net
ICQ: #60745924 \ teastep@shorewall.net
prev parent reply other threads:[~2002-10-21 14:07 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-18 14:56 Strange Problem - IPTables or Hardware related ???? Rodolfo Siviero Stein
2002-10-18 21:01 ` Joel Newkirk
2002-10-21 14:07 ` Tom Eastep [this message]
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