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DHCP Activity (4004)

DHCP Activity events report MAC to IP assignment via DHCP from a client or server.

  • Category: Network Activity
  • Extends: base_event
  • UID: 4004

Attributes

Section titled “Attributes”

Classification

Section titled “Classification”

activity_id

  • Type: integer_t
  • Requirement: required
  • Values:
    • 0 - Unknown: The event activity is unknown.
    • 1 - Discover: DHCPDISCOVER
    • 2 - Offer: DHCPOFFER
    • 3 - Request: DHCPREQUEST
    • 4 - Decline: DHCPDECLINE
    • 5 - Ack: DHCPACK: The server accepts the request by sending the client a DHCP Acknowledgment message.
    • 6 - Nak: DHCPNAK
    • 7 - Release: DHCPRELEASE: A DHCP client sends a DHCPRELEASE packet to the server to release the IP address and cancel any remaining lease.
    • 8 - Inform: DHCPINFORM
    • 9 - Expire: DHCPEXPIRE: A DHCP lease expired.
    • 99 - Other: The event activity is not mapped.

The normalized identifier of the activity that triggered the event.

category_uid

  • Type: integer_t
  • Requirement: required
  • Values:
    • 4 - Network Activity: Network Activity events.

The category unique identifier of the event.

class_uid

  • Type: integer_t
  • Requirement: required
  • Values:
    • 4004 - DHCP Activity: DHCP Activity events report MAC to IP assignment via DHCP from a client or server.

The unique identifier of a class. A Class describes the attributes available in an event.

severity_id

  • Type: integer_t
  • Requirement: required
  • Values:
    • 0 - Unknown: The event severity is not known.
    • 1 - Informational: Informational message. No action required.
    • 2 - Low: The user decides if action is needed.
    • 3 - Medium: Action is required but the situation is not serious at this time.
    • 4 - High: Action is required immediately.
    • 5 - Critical: Action is required immediately and the scope is broad.
    • 6 - Fatal: An error occurred but it is too late to take remedial action.
    • 99 - Other: The event severity is not mapped. See the severity attribute, which contains a data source specific value.

The normalized identifier of the event severity.The normalized severity is a measurement the effort and expense required to manage and resolve an event or incident. Smaller numerical values represent lower impact events, and larger numerical values represent higher impact events.

type_uid

  • Type: integer_t
  • Requirement: required
  • Values:
    • 400400 - DHCP Activity: Unknown
    • 400401 - DHCP Activity: Discover: DHCPDISCOVER
    • 400402 - DHCP Activity: Offer: DHCPOFFER
    • 400403 - DHCP Activity: Request: DHCPREQUEST
    • 400404 - DHCP Activity: Decline: DHCPDECLINE
    • 400405 - DHCP Activity: Ack: DHCPACK: The server accepts the request by sending the client a DHCP Acknowledgment message.
    • 400406 - DHCP Activity: Nak: DHCPNAK
    • 400407 - DHCP Activity: Release: DHCPRELEASE: A DHCP client sends a DHCPRELEASE packet to the server to release the IP address and cancel any remaining lease.
    • 400408 - DHCP Activity: Inform: DHCPINFORM
    • 400409 - DHCP Activity: Expire: DHCPEXPIRE: A DHCP lease expired.
    • 400499 - DHCP Activity: Other

The event type ID. It identifies the event’s semantics and structure. The value is calculated by the logging system as: class_uid * 100 + activity_id.

activity_name

  • Type: string_t
  • Requirement: optional

The event activity name, as defined by the activity_id.

category_name

  • Type: string_t
  • Requirement: optional

The event category name, as defined by category_uid value: Network Activity.

class_name

  • Type: string_t
  • Requirement: optional

The event class name, as defined by class_uid value: DHCP Activity.

severity

  • Type: string_t
  • Requirement: optional

The event severity, normalized to the caption of the severity_id value. In the case of ‘Other’, it is defined by the event source.

type_name

  • Type: string_t
  • Requirement: optional

The event type name, as defined by the type_uid.

Context

Section titled “Context”

metadata

The metadata associated with the event.

api cloud

  • Type: api
  • Requirement: optional

Describes details about a typical API (Application Programming Interface) call.

enrichments

The additional information from an external data source, which is associated with the event. For example add location information for the IP address in the DNS answers:[{"name": "answers.ip", "value": "92.24.47.250", "type": "location", "data": {"city": "Socotra", "continent": "Asia", "coordinates": [-25.4153, 17.0743], "country": "YE", "desc": "Yemen"}}]

raw_data

  • Type: string_t
  • Requirement: optional

The event data as received from the event source.

unmapped

  • Type: object
  • Requirement: optional

The attributes that are not mapped to the event schema. The names and values of those attributes are specific to the event source.

Occurrence

Section titled “Occurrence”

time

  • Type: timestamp_t
  • Requirement: required

The normalized event occurrence time.

timezone_offset

  • Type: integer_t
  • Requirement: recommended

The number of minutes that the reported event time is ahead or behind UTC, in the range -1,080 to +1,080.

count

  • Type: integer_t
  • Requirement: optional

The number of times that events in the same logical group occurred during the event Start Time to End Time period.

duration

  • Type: integer_t
  • Requirement: optional

The event duration or aggregate time, the amount of time the event covers from start_time to end_time in milliseconds.

end_time

  • Type: timestamp_t
  • Requirement: optional

The end time of a time period, or the time of the most recent event included in the aggregate event.

end_time_dt datetime

  • Type: datetime_t
  • Requirement: optional

The end time of a time period, or the time of the most recent event included in the aggregate event.

start_time

  • Type: timestamp_t
  • Requirement: optional

The start time of a time period, or the time of the least recent event included in the aggregate event.

start_time_dt datetime

  • Type: datetime_t
  • Requirement: optional

The start time of a time period, or the time of the least recent event included in the aggregate event.

time_dt datetime

  • Type: datetime_t
  • Requirement: optional

The normalized event occurrence time.

Primary

Section titled “Primary”

cloud cloud

  • Type: cloud
  • Requirement: required

Describes details about the Cloud environment where the event was originally created or logged.

device host

  • Type: device
  • Requirement: recommended

An addressable device, computer system or host.

dst_endpoint

The responder (server) of the DHCP connection.

message

  • Type: string_t
  • Requirement: recommended

The description of the event, as defined by the event source.

src_endpoint

The initiator (client) of the DHCP connection.

status_id

  • Type: integer_t
  • Requirement: recommended
  • Values:
    • 0 - Unknown
    • 1 - Success
    • 2 - Failure
    • 99 - Other: The event status is not mapped. See the status attribute, which contains a data source specific value.

The normalized identifier of the event status.

actor host

  • Type: actor
  • Requirement: optional

The actor object describes details about the user/role/process that was the source of the activity.

is_renewal

  • Type: boolean_t
  • Requirement: optional

The indication of whether this is a lease/session renewal event.

lease_dur

  • Type: integer_t
  • Requirement: optional

This represents the length of the DHCP lease in seconds. This is present in DHCP Ack events. (activity_id = 1)

observables

The observables associated with the event.

relay

The network relay that is associated with the event.

status

  • Type: string_t
  • Requirement: optional

The event status, normalized to the caption of the status_id value. In the case of ‘Other’, it is defined by the event source.

status_code

  • Type: string_t
  • Requirement: optional

The event status code, as reported by the event source.

For example, in a Windows Failed Authentication event, this would be the value of ‘Failure Code’, e.g. 0x18.

status_detail

  • Type: string_t
  • Requirement: optional

The status details contains additional information about the event outcome.

transaction_uid

  • Type: string_t
  • Requirement: optional

The unique identifier of the transaction. This is typically a random number generated from the client to associate a dhcp request/response pair.

Objects Used

Section titled “Objects Used”