Option 1: Disable Ping: # echo 1 >/proc/sys/net/ipv4/icmp_echo_ignore_all
Enable Ping: # echo 0 >/proc/sys/net/ipv4/icmp_echo_ignore_all
Option 2: Disable and enable ping in permanent way Disable Ping: Set the following into /etc/sysctl.conf file net.ipv4.icmp_echo_ignore_all = 1
Reload /etc/sysctl.conf # sysctl -p
Enable Ping: Set the following into /etc/sysctl.conf file net.ipv4.icmp_echo_ignore_all = o
Reload /etc/sysctl.conf # sysctl -p
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