blocking icmp protocol

John O'Loughlin j.oloughlin at qmul.ac.uk
Sun Dec 17 18:25:03 UTC 2006


filter is the default table so -t filter is not needed, also this will 
drop all icmp from everywhere, which may  not be what he wants.

If the host can still ping you it may well be the case that an earlier 
rule is allowing them to do so, remember iptables works on a first match 
basis.

John

On Sun, 17 Dec 2006, Waleed Harbi wrote:

> iptables -t filter -A INPUT -p icmp -i eth0 -j DROP
>
> On 12/17/06, tamer amr <tamer_linux at yahoo.com> wrote:
>> 
>> hi
>> 
>> i can't disable the icmp with iptables
>> i made the following command
>> 
>> iptables -A INPUT -p icmp -s 192.168.1.125 -j DROP
>> 
>> but still  this ip can ping my host
>> 
>> thank you
>> 
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