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 [...]
