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How to disable ping on RedHat Linux

Question:

How can I disable ping on my RedHat server?

Answer:

To change it permanently (including after reboot), edit config file /etc/sysctl.conf
and add this line at the end:

net.ipv4.icmp_echo_ignore_all=1

Alternatively, for a quick disabling until the next reboot, you can use sysctl:

sysctl -w net.ipv4.icmp_echo_ignore_all=1

[root@gxn1/]# sysctl -w net.ipv4.icmp_echo_ignore_all=1
 [root@gxn1/]#
 [root@gnx1 /]# cd /etc
 [root@gnx1 etc]# vi sysctl.conf
 
 

Generated 20:02:23 on Sep 19, 2017