From mboxrd@z Thu Jan  1 00:00:00 1970
From: Zoltan Nagy <kirk@nemesys.hu>
Subject: Re: Ping flood
Date: Tue, 01 Nov 2005 18:08:45 +0100
Message-ID: <4367A11D.8000205@nemesys.hu>
References: <43677BFD.3080805@darkstar.nom.za>
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To: Paulo Andre <pandre@darkstar.nom.za>
Cc: netfilter <netfilter@lists.netfilter.org>


consider dropping all multicast packets
$ipt    -d 224.0.0.0/4                  -j DROP


Paulo Andre wrote:
> I have the following log:
> Nov  1 09:10:40 guardian ---SA_IN--- IN=eth1 OUT=
> MAC=ff:ff:ff:ff:ff:ff:00:e0:1e:83:d5:19:08:00  SRC=64.34.170.237
> DST=255.255.255.255 LEN=1072 TOS=00 PREC=0x40 TTL=243 ID=12209 DF
> PROTO=ICMP TYPE=8 CODE=0 ID=0 SEQ=0
> 
> I am receiving thousands of these a day, icmp traffic is blocked with
> iptables. But still this traffic is coming up the line. Is my only
> solution to contact the ISP or is there something I can do in
> iptables/linux?
> 
> Paulo
> 
>