Saturday, May 25, 2024
HomeLinuxLinux networkingDisable ICMP echo (ping) responses in Linux

Disable ICMP echo (ping) responses in Linux

Many malicious attacks begin with a ping scan. Disabling ICMP echo requests prevents your system’s discovery with a ping.


As superuser, add the following lines to /etc/sysctl.conf

net.ipv4.icmp_echo_ignore_broadcasts = 1
net.ipv4.icmp_echo_ignore_all = 1

Then run the following command to cause the change to take effect immediately:

sysctl -p

This change will persist following a reboot.

Quinn McHenry
Quinn McHenry
Quinn was one of the original co-founders of Tech-Recipes. He is currently crafting iOS applications as a senior developer at Small Planet Digital in Brooklyn, New York.
RELATED ARTICLES

LEAVE A REPLY

Please enter your comment!
Please enter your name here

Most Popular

LATEST REVIEWS

Recent Comments

error: Content is protected !!