How do I disable ping responses from my system?

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To configure a Red Hat Enterprise Linux system to not respond to a ICMP (ping), run the following command as the root user.

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

To make the changes persistent across reboots, add the following line to your /etc/sysctl.conf file.

# Ignore all to ICMP (ping)
net.ipv4.icmp_echo_ignore_all ...

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