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To drop all ping packets all together
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You can setup kernel variable to drop all ping packets.
# echo "1" > /proc/sys/net/ipv4/icmp_echo_ignore_all
This instructs the kernel to simply ignore all ping requests (ICMP type 0 messages).
To enable ping request type the command:
# echo "0" > /proc/sys/net/ipv4/icmp_echo_ignore_all
[or]
You can drop by adding following line to /etc/sysctl.conf file:
net.ipv4.icmp_echo_ignore_all = 1
Save and close the file.
