This simple and brief tutorial is going to show you how to disable ping response on Ubuntu Server to make it more secure.

To get started, run command below to get the root privilege:

sudo su

Then you can disable ping via one of below commands:

echo  1  > /proc/sys/net/ipv4/icmp_echo_ignore_all

or

iptables  -I  INPUT  -i  ech0  -p   icmp  -s  0/0  -d  0/0   -j  DROP

To re-enable ping:

echo  0  > /proc/sys/net/ipv4/icmp_echo_ignore_all

or

iptables  -I  INPUT  -i  ech0  -p   icmp  -s  0/0  -d  0/0   -j  ACCEPT

To make it permanently, edit the “/etc/sysctl.conf” file so that the setting gets picked up at boot time.

net.ipv4.icmp_echo_ignore_all=1