Network
IP
• IP Invalid Header Checksum: The header portion of the IP datagram is in error. One or more bits has erroneously changed (with the exception of the TTL) since the IP datagram was transmitted by the source IP host.
• IP Local Routing: Two identical IP packets except for the TTL have been detected.
• IP Network Duplicated Packet: A single packet has appeared multiple times on your network. This could be a waste of network resources.
• IP Low Time-To-Live: The IP Time-To-Live (TTL) has fallen to or below a pre-determined threshold indicating that the packet can only traverse that many more routers before it is discarded
• IP Missing Fragment: An IP datagram has been fragmented by the host application or a router, and one of the fragments is missing.
• IP Packet with CRC Frame Error: The CRC re-computed by the analyzer when the frame was received did not match the CRC at the end of the frame, indicating one or more corrupted bits in the frame. If the IP Header Checksum is okay, then the problem is most likely elsewhere in the frame.
• IP Zero Address in Broadcast: An IP UDP packet is being broadcast using the old IP broadcast address of 0.0.0.0.
• IP Length Exceeds Packet Length: The value in the IPv4 Total Length field is larger than the actual amount of IP data in the packet.
ICMP
• ICMP Network Unreachable: A router is reporting back to the source host that it cannot forward a packet on to a network along the path to the destination host.
• ICMP Host Unreachable: A router is reporting back to the source host that it cannot forward the packet to the destination host.
• ICMP Protocol Unreachable: The destination host is reporting back to the source host that the indicated next layer protocol (usually TCP or UDP) is not available.ICMP Port Unreachable
• ICMP Port Unreachable: The destination host is reporting back to the source that the application layer protocol as specified by the UDP port is not supported.
• ICMP Fragmentation Needed: A router is reporting back to the destination host that fragmentation is required to forward the packet, but the Don't Fragment bit was set in the IP header.
• ICMP Source Route Failed: A router is reporting back to the source host that the path specified by the source cannot be followed.
• ICMP Host Unknown: A router is reporting back to the source host that the destination host does not exist.
• ICMP Net Unreachable TOS: A router is reporting back to the source host that a network is unavailable for the Type of Service (TOS) specified in the original IP datagram's header.
• ICMP Host Unreachable TOS: A router is reporting back to the source host that the destination host is unavailable for the Type of Service (TOS) specified in the original IP datagram’s header.
• ICMP Comm Admin Prohibited: A router is reporting back to the source host that it cannot forward the original datagram due to administrative filtering settings.
• ICMP Host Precedence Violation: The first hop router is reporting back to the source host that a requested precedence is not permitted.
• ICMP Precedence Cutoff: A router is reporting back to the source host that a network has a minimum precedence level that is not satisfied by the original datagram.
• ICMP Host Redirect: A router is reporting back to the source host that it should use an alternate route for the destination host.
• ICMP Host TOS Redirect: A router is reporting back to the source host that it should use an alternate route for the destination network and Type of Service (TOS).
• ICMP TTL Exceeded: A router is reporting back to the source host that a datagram has expired before being delivered to the destination host.
• ICMP Fragmentation Time Exceeded: The destination host is reporting back to the source host that not all fragments of a datagram have been received.
• ICMP Parameter Problem: The reporting host is reporting back to the source host that it found a problem with the header parameters in the original data gram such that it could not complete processing of the datagram and must discard it.
• ICMP Obsolete Message: The reporting host is using an ICMP message type that has been obsoleted or deprecated. Recipient hosts may not understand the error message as a result.
IPsec
• ESP Out of Sequence: An ESP packet has been captured out if its intended sequential order.