Disable ICMP echo (ping) responses in Linux

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From the computer of: qmchenry (339 recipes)
Created: Sep 05, 2003     Updated: Sep 22, 2003


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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.

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3 Recipe comments: View comments

Disable ICMP echo (ping) responses in Linux by Anonymous
Better way by Anonymous
Disableing ICMP Pings in the firewall by Anonymous



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