How to disable ping in a linux machine

Sometimes for security reasons or during the time of DDOS attack, we may be forced to disable ping to our server.

This can be done by running the following command:
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echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all
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This will drop all incoming ping packets to the server.

Now, to enable the ping back, run the below command:
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echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_all
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Cool :)