Rule:

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Sid:
394

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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.

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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.

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Detailed Information:
This ICMP message will be generated when the destination host specified in the datagram is unreachable.

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Attack Scenarios:
None Known

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Ease of Attack:
Numerous tools and scripts can generate this type of ICMP datagrams.

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False Positives:
None Known

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False Negatives:
None Known

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Corrective Action:
This rule detects informational network information, no correct action is necessary.

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Contributors:
Original Rule writer unknown
Sourcefire Research Team
Matthew Watchinski (matt.watchinski@sourcefire.com)

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Additional References:
None


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