You can disable ping command in the server coz many users wants to disable PING to avoid detection or to keep away from Hackers. doing below steps

to disable the ping

admin@smartproteam$ echo 1  > /proc/sys/net/ipv4/icmp_echo_ignore_all

to enable the ping

admin@smartproteam$ echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_all