I want to disable ping response all the time on my Ubuntu operating system, the following commands work but only until the system reboots:

Ping off:

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

Ping on:

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

How would I be able to leave echo off even after having rebooted my laptop?


How would I be able to leave echo off even when I am rebooting my laptop?

You can use one of the following three ways (as root):

Edit /etc/sysctl.conf

Add the following line to your /etc/sysctl.conf:



sysctl -p

Using iptables:

iptables -I INPUT -p icmp --icmp-type echo-request -j DROP

With cron

Run crontab -e as root, then add the following line:

@reboot echo "1" > /proc/sys/net/ipv4/icmp_echo_ignore_all

Start and enable the service:

systemctl start cron.service
systemctl enable cron.service
| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.