configure kernel parameters in redhat enterprise Linux :
How to turn off ping response in redhat Linux :
#cat /proc/sys/net/ipv4/icmp_echo_ignore_all
0
Zero means ping is enable and Linux machine will respond to ping requests.
# echo "1" > /proc/sys/net/ipv4/icmp_echo_ignore_all
This kernel change is not permanent , to make it permanent add to /etc/sysctl.conf :
net.ipv4.icmp_echo_ignore_all=1
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