stop ping response from server

[neha]

Hi,

can anybody pls point me how to stop response from my server (centos 5.3) for a ping request? or in other way, discard incoming icmp packets.

thanks
Neha

[sush]

you can block incoming icmp packets using this iptable rule:

Code: Select all

iptables -A INPUT -p icmp --icmp-type any -j REJECT

[shankar]

You can also add the following line in to /etc/sysctl.conf to stop ping request.

net.ipv4.icmp_echo_ignore_all=1

It also stops the ping request.