GEN:SID 1:394
Message ICMP Destination Unreachable Destination Host Unknown
Summary This event is generated when an ICMP Destination Host Unknown datagram is detected on the network.  Gateway devices normally generate these ICMP messages when the destination's IP address is unreachable.
Impact This rule generates informational events about the network.  Large numbers of these messages on the network could indication routing problems or faulty routing devices.
Detailed Information This ICMP message will be generated when the destination host specified in the datagram is unreachable.
Affected Systems  
Attack Scenarios None Known
Ease of Attack Numerous tools and scripts can generate this type of ICMP datagrams.
Corrective Action This rule detects informational network information, no correct action is necessary.
Additional References None