| GEN:SID | 1:420 |
| Message | ICMP Mobile Host Redirect undefined code |
| Summary | This event is generated when a network host generates an ICMP Mobile Host Redirect datagram with an undefined ICMP code.
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| Impact | Undefined ICMP Code values should never be seen on the network. This could be an indication of nefarious activity on the network.
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| Detailed Information | The Transparent Internet Routing for IP Mobile Hosts IETF draft defines ICMP Type 32 Code 0 as an ICMP Mobile Host Redirect Message. This message was intended to be used by mobile computers to inform base-stations of their location on the network as they move from base-station to base-station. In normal situations the ICMP Code should be set to 0, values other than 0 are undefined and should never be used.
This IETF draft was never ratified, and no hardware is known to exist that generates this type of ICMP datagram
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| Affected Systems | |
| Attack Scenarios | None known
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| Ease of Attack | Numerous tools and scripts can generate this type of ICMP datagram.
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| Corrective Action | ICMP Type 32 datagrams are not normal network activity. Hosts generating these types of datagrams should be investigated for nefarious activity
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| Additional References | None
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