One or more ICMP error responses has been received.

Recommended action

No action required.

Detailed explanation

ICMP (Internet Control Message Protocol) is a reporting protocol for the IP component of TCP/IP. ICMP relays messages about the status of an IP connection.

The ICMP error response received is the secondary message displayed with this observation (see below).

Possible secondary messages

  • "Parameter Problem" This message (ICMP type 12) is generated as a response for any error not specifically covered by another ICMP message. The IP header plus the first 8 bytes of the original packet's data is returned to the sender. This data is used by the host to match the message to the appropriate process. If the router or host processing a packet finds a problem with the header parameters such that it cannot complete processing the packet, then it must discard the packet. Either the IP header is invalid or a required option is missing. The router or host may also notify the source host via the parameter problem message. This message is only sent if the error caused the packet to be discarded.
  • "Message type unrecognized"
  • "Port is unreachable" In the destination host, the IP module cannot deliver the packet because the indicated process port is not active.
  • "Protocol is unreachable" In the destination host, the IP module cannot deliver the packet because the indicated protocol module is not active. One or more ICMP error responses has been received. ICMP (Internet Control Message Protocol) is a reporting protocol for the IP component of TCP/IP. ICMP relays messages about the status of an IP connection.
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