ping disabled in linx ubuntu

linux has the files in /proc/sys/net/ipv4/
icmp_echo_ignore_broadcasts
icmp_echo_ignore_all
setting to control whether or not to answer broadcast pings
 
icmp_echo_ignore_all --> 0 disable - 1 --> enable
icmp_echo_ignore_broadcasts --> 0 disable - 1 --> enable
 
ignore_broadcasts=1 is the default, and is telling it to ignore broadcasts.