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<H1>[Mageia-discuss] Odd entry in log file</H1>
<B>Maarten Vanraes</B>
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TITLE="[Mageia-discuss] Odd entry in log file">alien at rmail.be
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<I>Tue May 8 21:17:27 CEST 2012</I>
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<PRE>Op dinsdag 08 mei 2012 02:05:44 schreef imnotpc:
[...]
><i> > promiscuous mode means you're passing through from layer 2 to layer 3
</I>><i> > irrespective of mac address (ie: even if it's not for you)
</I>><i> >
</I>><i> > iptables is not complaining
</I>><i> >
</I>><i> > martians is kernel level, (resource path filtering (for asynchronous
</I>><i> > routing)), before iptables even comes into play.
</I>><i>
</I>><i> So the kernel would log the martian before iptables sees it? That
</I>><i> explains why it isn't dropped by the firewall. But that begs the
</I>><i> question, is there any point in using iptables rules to block packets
</I>><i> from other subnets if iptables will never see them? Just about every
</I>><i> sample firewall ruleset I've ever seen does this either explicitly or by
</I>><i> allowing them to fall through to the default DROP rule. Now that I'm
</I>><i> thinking back, in 10+ years of Linux LAN experience I've never seen a
</I>><i> martian packet logged by any of my firewalls. i just assumed it was good
</I>><i> network management ;-)
</I>
yes, because rp_filter level can be adjusted in the kernel :-)
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