How to Change the Reply ping to “host-unreachable” :
your ip : 23.24.25.26
your command : ping 23.24.25.26
Reply message : 32 bytes from 23.24.25.26 : icmp_seq=2 …
1 – Connect to the server (OS is Linux) :
2 – run the following command
# iptables -A INPUT -p icmp -j REJECT –reject-with icmp-host-unreachable