pingの応答

$ ping hogehoge
PING hogehoge (172.16.1.1): 56 data bytes
64 bytes from 172.16.1.1: icmp_seq=0 ttl=128 time=0 ms
48 bytes from xxx.xxx.xxx.xxx: icmp_type=3 (Dest Unreachable) icmp_code=10
64 bytes from 172.16.1.1: icmp_seq=1 ttl=128 time=0 ms
48 bytes from xxx.xxx.xxx.xxx: icmp_type=3 (Dest Unreachable) icmp_code=10
64 bytes from 172.16.1.1: icmp_seq=2 ttl=128 time=0 ms
64 bytes from 172.16.1.1: icmp_seq=3 ttl=128 time=0 ms
64 bytes from 172.16.1.1: icmp_seq=4 ttl=128 time=0 ms
64 bytes from 172.16.1.1: icmp_seq=5 ttl=128 time=0 ms

----hogehoge PING Statistics----
6 packets transmitted, 6 packets received, 0.0% packet loss
round-trip (ms)  min/avg/max/med = 0/0/0/0

妙なところから応答が来ている

TYPE	CODE	意味
3	10	Destination host administratively prohibited (宛先ホストは設定によりアクセス禁止)

http://www.asahi-net.or.jp/~AA4T-NNGK/ipttut/output/icmptypes.html

なんだこれ