aws.vpc

Filters

• config-compliance

• dhcp-options

• event

• finding

• flow-logs

• internet-gateway

• json-diff

• marked-for-op

• nat-gateway

• ops-item

• reduce

• security-group

• subnet

• tag-count

• value

• vpc-attributes

dhcp-options

Filter VPCs based on their dhcp options

example

policies:
   - name: vpcs-in-domain
     resource: vpc
     filters:
       - type: dhcp-options
         domain-name: ec2.internal

if an option value is specified as a list, then all elements must be present. if an option value is specified as a string, then that string must be present.

vpcs not matching a given option value can be found via specifying a present: false parameter.

properties:
  domain-name:
    oneOf:
    - items:
        type: string
      type: array
    - type: string
  domain-name-servers:
    oneOf:
    - items:
        type: string
      type: array
    - type: string
  ntp-servers:
    oneOf:
    - items:
        type: string
      type: array
    - type: string
  present:
    type: boolean
  type:
    enum:
    - dhcp-options
required:
- type

Permissions - ec2:DescribeDhcpOptions

flow-logs

Are flow logs enabled on the resource.

ie to find all vpcs with flows logs disabled we can do this

example

policies:
  - name: flow-logs-enabled
    resource: vpc
    filters:
      - flow-logs

or to find all vpcs with flow logs but that don’t match a particular configuration.

example

policies:
  - name: flow-mis-configured
    resource: vpc
    filters:
      - not:
        - type: flow-logs
          enabled: true
          set-op: or
          op: equal
          # equality operator applies to following keys
          traffic-type: all
          status: active
          log-group: vpc-logs

properties:
  deliver-status:
    enum:
    - success
    - failure
  destination:
    type: string
  destination-type:
    enum:
    - s3
    - cloud-watch-logs
  enabled:
    default: false
    type: boolean
  log-format:
    type: string
  log-group:
    type: string
  op:
    default: equal
    enum:
    - equal
    - not-equal
  set-op:
    default: or
    enum:
    - or
    - and
  status:
    enum:
    - active
  traffic-type:
    enum:
    - accept
    - reject
    - all
  type:
    enum:
    - flow-logs
required:
- type

Permissions - ec2:DescribeFlowLogs

internet-gateway

Filter VPCs based on Internet Gateway attributes

example

policies:
  - name: vpc-by-igw
    resource: vpc
    filters:
      - type: internet-gateway
        key: tag:Color
        value: Gray

properties:
  default:
    type: object
  key:
    type: string
  match-resource:
    type: boolean
  op:
    enum:
    - eq
    - equal
    - ne
    - not-equal
    - gt
    - greater-than
    - ge
    - gte
    - le
    - lte
    - lt
    - less-than
    - glob
    - regex
    - regex-case
    - in
    - ni
    - not-in
    - contains
    - difference
    - intersect
  operator:
    enum:
    - and
    - or
  type:
    enum:
    - internet-gateway
  value:
    oneOf:
    - type: array
    - type: string
    - type: boolean
    - type: number
    - type: 'null'
  value_from:
    additionalProperties: 'False'
    properties:
      expr:
        oneOf:
        - type: integer
        - type: string
      format:
        enum:
        - csv
        - json
        - txt
        - csv2dict
      url:
        type: string
    required:
    - url
    type: object
  value_regex:
    type: string
  value_type:
    enum:
    - age
    - integer
    - expiration
    - normalize
    - size
    - cidr
    - cidr_size
    - swap
    - resource_count
    - expr
    - unique_size
    - date
    - version
required:
- type

Permissions - ec2:DescribeInternetGateways

json-diff

Compute the diff from the current resource to a previous version.

A resource matches the filter if a diff exists between the current resource and the selected revision.

Utilizes config as a resource revision database.

Revisions can be selected by date, against the previous version, and against a locked version (requires use of is-locked filter).

properties:
  selector:
    enum:
    - previous
    - date
    - locked
  selector_value:
    type: string
  type:
    enum:
    - json-diff
required:
- type

Permissions - config:GetResourceConfigHistory

nat-gateway

Filter VPCs based on NAT Gateway attributes

example

policies:
  - name: vpc-by-nat
    resource: vpc
    filters:
      - type: nat-gateway
        key: tag:Color
        value: Gray

properties:
  default:
    type: object
  key:
    type: string
  match-resource:
    type: boolean
  op:
    enum:
    - eq
    - equal
    - ne
    - not-equal
    - gt
    - greater-than
    - ge
    - gte
    - le
    - lte
    - lt
    - less-than
    - glob
    - regex
    - regex-case
    - in
    - ni
    - not-in
    - contains
    - difference
    - intersect
  operator:
    enum:
    - and
    - or
  type:
    enum:
    - nat-gateway
  value:
    oneOf:
    - type: array
    - type: string
    - type: boolean
    - type: number
    - type: 'null'
  value_from:
    additionalProperties: 'False'
    properties:
      expr:
        oneOf:
        - type: integer
        - type: string
      format:
        enum:
        - csv
        - json
        - txt
        - csv2dict
      url:
        type: string
    required:
    - url
    type: object
  value_regex:
    type: string
  value_type:
    enum:
    - age
    - integer
    - expiration
    - normalize
    - size
    - cidr
    - cidr_size
    - swap
    - resource_count
    - expr
    - unique_size
    - date
    - version
required:
- type

Permissions - ec2:DescribeNatGateways

security-group

Filter VPCs based on Security Group attributes

example

policies:
  - name: vpc-by-sg
    resource: vpc
    filters:
      - type: security-group
        key: tag:Color
        value: Gray

properties:
  default:
    type: object
  key:
    type: string
  match-resource:
    type: boolean
  op:
    enum:
    - eq
    - equal
    - ne
    - not-equal
    - gt
    - greater-than
    - ge
    - gte
    - le
    - lte
    - lt
    - less-than
    - glob
    - regex
    - regex-case
    - in
    - ni
    - not-in
    - contains
    - difference
    - intersect
  operator:
    enum:
    - and
    - or
  type:
    enum:
    - security-group
  value:
    oneOf:
    - type: array
    - type: string
    - type: boolean
    - type: number
    - type: 'null'
  value_from:
    additionalProperties: 'False'
    properties:
      expr:
        oneOf:
        - type: integer
        - type: string
      format:
        enum:
        - csv
        - json
        - txt
        - csv2dict
      url:
        type: string
    required:
    - url
    type: object
  value_regex:
    type: string
  value_type:
    enum:
    - age
    - integer
    - expiration
    - normalize
    - size
    - cidr
    - cidr_size
    - swap
    - resource_count
    - expr
    - unique_size
    - date
    - version
required:
- type

Permissions - ec2:DescribeSecurityGroups

subnet

Filter VPCs based on Subnet attributes

example

policies:
  - name: vpc-by-subnet
    resource: vpc
    filters:
      - type: subnet
        key: tag:Color
        value: Gray

properties:
  default:
    type: object
  key:
    type: string
  match-resource:
    type: boolean
  op:
    enum:
    - eq
    - equal
    - ne
    - not-equal
    - gt
    - greater-than
    - ge
    - gte
    - le
    - lte
    - lt
    - less-than
    - glob
    - regex
    - regex-case
    - in
    - ni
    - not-in
    - contains
    - difference
    - intersect
  operator:
    enum:
    - and
    - or
  type:
    enum:
    - subnet
  value:
    oneOf:
    - type: array
    - type: string
    - type: boolean
    - type: number
    - type: 'null'
  value_from:
    additionalProperties: 'False'
    properties:
      expr:
        oneOf:
        - type: integer
        - type: string
      format:
        enum:
        - csv
        - json
        - txt
        - csv2dict
      url:
        type: string
    required:
    - url
    type: object
  value_regex:
    type: string
  value_type:
    enum:
    - age
    - integer
    - expiration
    - normalize
    - size
    - cidr
    - cidr_size
    - swap
    - resource_count
    - expr
    - unique_size
    - date
    - version
required:
- type

Permissions - ec2:DescribeSubnets

vpc-attributes

Filters VPCs based on their DNS attributes

example

policies:
  - name: dns-hostname-enabled
    resource: vpc
    filters:
      - type: vpc-attributes
        dnshostnames: True

properties:
  dnshostnames:
    type: boolean
  dnssupport:
    type: boolean
  type:
    enum:
    - vpc-attributes
required:
- type

Permissions - ec2:DescribeVpcAttribute

Actions

• auto-tag-user

• copy-related-tag

• invoke-lambda

• invoke-sfn

• mark-for-op

• normalize-tag

• notify

• post-finding

• post-item

• put-metric

• remove-tag

• rename-tag

• set-flow-log

• tag

• tag-trim

• webhook

set-flow-log

Create flow logs for a network resource

example

policies:
  - name: vpc-enable-flow-logs
    resource: vpc
    filters:
      - type: flow-logs
        enabled: false
    actions:
      - type: set-flow-log
        DeliverLogsPermissionArn: arn:iam:role
        LogGroupName: /custodian/vpc/flowlogs/

properties:
  DeliverLogsPermissionArn:
    type: string
  LogDestination:
    type: string
  LogDestinationType:
    enum:
    - s3
    - cloud-watch-logs
  LogFormat:
    type: string
  LogGroupName:
    type: string
  MaxAggregationInterval:
    type: integer
  TrafficType:
    enum:
    - ACCEPT
    - REJECT
    - ALL
    type: string
  state:
    type: boolean
  type:
    enum:
    - set-flow-log

Permissions - ec2:CreateFlowLogs, logs:CreateLogGroup