Q & A

The basic network discovery always start with ping utility.So blocking the ping requests will make the system discovery difficult. To disable ping requests ,we just need to add/modify some kernel parameters.

What we are doing here is the permanent change.

So open /etc/sysctl.conf  and add the following line to /etc/sysctl.conf

net.ipv4.icmp_echo_ignore_all = 1

And reload kernel parameters using command sysctl -p (sysctl -p is used to reload kernel parameters at runtime).
After successful configuration,if any one try to ping your server end up with no response.