国外可以ping
[root@ a ~]# ping 68.178.232.100
PING 68.178.232.100 (68.178.232.100) 56(84) bytes of data.
64 bytes from 68.178.232.100: icmp_seq=1 ttl=115 time=193 ms
64 bytes from 68.178.232.100: icmp_seq=2 ttl=115 time=193 ms
64 bytes from 68.178.232.100: icmp_seq=3 ttl=115 time=193 ms
64 bytes from 68.178.232.100: icmp_seq=4 ttl=115 time=193 ms
64 bytes from 68.178.232.100: icmp_seq=5 ttl=115 time=193 ms
64 bytes from 68.178.232.100: icmp_seq=6 ttl=115 time=193 ms