Martijn van Oosterhout wrote:
On Tue, Dec 20, 2005 at 12:34:25PM +0100, Marco Berizzi wrote:
> Good morning Bill.
> I think I have found the "feature":
/proc/sys/net/ipv4/conf/*/log_martians
> Enabling it and then dmesging I see:
>
> Dec 20 10:18:42 Pleiadi kernel: martian source
'HDSL_public_network_host'
> from 'ADSL_IP', on dev eth0
> Dec 20 10:18:42 Pleiadi kernel: ll header:
> 00:60:97:d8:e5:01:00:07:50:7e:65:e0:08:00
>
> So I think linux will drop these packets anyway (they will even not
reach
> netfilter I think):
> may anyone confirm this?
They get dropped by the rp_filter. If you disable the rp_filter, they
don't get dropped (or logged) anymore...
I tried to echo 0 > rp_filter (on eth0, eth1, eth2, lo, default, all) and
echo 1 > log_martians (on eth0, eth1, eth2, lo, default, all) and linux
(2.6.14.4) is logging these packets. They also are dropped.
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