ICMP code 0x3, the requested service is unavailable due to one of the following reasons:
|Subcode|Reason |0|DestinationNetworkUnreachable |1|DestinationHostUnreachable |2|DestinationProtocolUnreachable |3|DestinationPortUnreachable |4|FragmentationRequiredAndDontFragmentSet |5|SourceRouteFailed |6|DestinationNetworkUnknown |7|DestinationHostUnknown |8|SourceHostIsolated |9|DestinationNetworkAdministrativelyProhibited |10|DestinationHostAdministrativelyProhibited |11|DestinationNetworkUnreachableForTypeOfService |12|DestinationHostUnreachableForTypeOfService |13|CommunicationAdministrativelyProhibited
||||IP Header |Type|Code||Checksum ||||Unused ||||IP Header + at least 64 bits of Original Data Datagram
16 pages link to DestinationUnreachable:
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