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Component: aws-waf-acl

This component is responsible for provisioning an AWS Web Application Firewall (WAF) with an associated managed rule group.

Usage​

Stack Level: Regional

Here's an example snippet for how to use this component.

components:
  terraform:
    aws-waf-acl:
      vars:
        enabled: true
        name: waf
        acl_name: default
        default_action: allow
        description: Default web ACL
        managed_rule_group_statement_rules:
        - name: "OWASP-10"
          # Rules are processed in order based on the value of priority, lowest number first
          priority: 1

          statement:
            name:  AWSManagedRulesCommonRuleSet
            vendor_name: AWS

          visibility_config:
            # Defines and enables Amazon CloudWatch metrics and web request sample collection.
            cloudwatch_metrics_enabled: false
            metric_name: "OWASP-10"
            sampled_requests_enabled: false

Requirements​

NameVersion
terraform>= 1.0.0
aws~> 4.0

Providers​

NameVersion
aws~> 4.0

Modules​

NameSourceVersion
aws_wafcloudposse/waf/aws0.0.4
iam_roles../account-map/modules/iam-rolesn/a
thiscloudposse/label/null0.25.0

Resources​

NameType
aws_ssm_parameter.acl_arnresource

Inputs​

NameDescriptionTypeDefaultRequired
acl_nameFriendly name of the ACL. The ACL ARN will be stored in SSM under {ssm_path_prefix}/{acl_name}/arnstringn/ayes
additional_tag_mapAdditional key-value pairs to add to each map in tags_as_list_of_maps. Not added to tags or id.
This is for some rare cases where resources want additional configuration of tags
and therefore take a list of maps with tag key, value, and additional configuration.		map(string){}no
association_resource_arnsA list of ARNs of the resources to associate with the web ACL.
This must be an ARN of an Application Load Balancer or an Amazon API Gateway stage.		list(string)[]no
attributesID element. Additional attributes (e.g. workers or cluster) to add to id,
in the order they appear in the list. New attributes are appended to the
end of the list. The elements of the list are joined by the delimiter
and treated as a single ID element.		list(string)[]no
byte_match_statement_rulesA rule statement that defines a string match search for AWS WAF to apply to web requests.

action:
The action that AWS WAF should take on a web request when it matches the rule's statement.
name:
A friendly name of the rule.
priority:
If you define more than one Rule in a WebACL,
AWS WAF evaluates each request against the rules in order based on the value of priority.
AWS WAF processes rules with lower priority first.

statement:
field_to_match:
The part of a web request that you want AWS WAF to inspect.
See https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/wafv2_web_acl#field-to-match
text_transformation:
Text transformations eliminate some of the unusual formatting that attackers use in web requests in an effort to bypass detection.
See https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/wafv2_web_acl#text-transformation

visibility_config:
Defines and enables Amazon CloudWatch metrics and web request sample collection.

cloudwatch_metrics_enabled:
Whether the associated resource sends metrics to CloudWatch.
metric_name:
A friendly name of the CloudWatch metric.
sampled_requests_enabled:
Whether AWS WAF should store a sampling of the web requests that match the rules.		list(any)nullno
contextSingle object for setting entire context at once.
See description of individual variables for details.
Leave string and numeric variables as null to use default value.
Individual variable settings (non-null) override settings in context object,
except for attributes, tags, and additional_tag_map, which are merged.		any
{
  "additional_tag_map": {},
  "attributes": [],
  "delimiter": null,
  "descriptor_formats": {},
  "enabled": true,
  "environment": null,
  "id_length_limit": null,
  "label_key_case": null,
  "label_order": [],
  "label_value_case": null,
  "labels_as_tags": [
    "unset"
  ],
  "name": null,
  "namespace": null,
  "regex_replace_chars": null,
  "stage": null,
  "tags": {},
  "tenant": null
}
no
default_actionSpecifies that AWS WAF should allow requests by default. Possible values: allow, block.string"block"no
delimiterDelimiter to be used between ID elements.
Defaults to - (hyphen). Set to "" to use no delimiter at all.		stringnullno
descriptionA friendly description of the WebACL.string"Managed by Terraform"no
descriptor_formatsDescribe additional descriptors to be output in the descriptors output map.
Map of maps. Keys are names of descriptors. Values are maps of the form
{<br/> format = string<br/> labels = list(string)<br/>}
(Type is any so the map values can later be enhanced to provide additional options.)
format is a Terraform format string to be passed to the format() function.
labels is a list of labels, in order, to pass to format() function.
Label values will be normalized before being passed to format() so they will be
identical to how they appear in id.
Default is {} (descriptors output will be empty).		any{}no
enabledSet to false to prevent the module from creating any resourcesboolnullno
environmentID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT'stringnullno
geo_match_statement_rulesA rule statement used to identify web requests based on country of origin.

action:
The action that AWS WAF should take on a web request when it matches the rule's statement.
name:
A friendly name of the rule.
priority:
If you define more than one Rule in a WebACL,
AWS WAF evaluates each request against the rules in order based on the value of priority.
AWS WAF processes rules with lower priority first.

statement:
country_codes:
A list of two-character country codes.
forwarded_ip_config:
fallback_behavior:
The match status to assign to the web request if the request doesn't have a valid IP address in the specified position.
Possible values: MATCH, NO_MATCH
header_name:
The name of the HTTP header to use for the IP address.

visibility_config:
Defines and enables Amazon CloudWatch metrics and web request sample collection.

cloudwatch_metrics_enabled:
Whether the associated resource sends metrics to CloudWatch.
metric_name:
A friendly name of the CloudWatch metric.
sampled_requests_enabled:
Whether AWS WAF should store a sampling of the web requests that match the rules.		list(any)nullno
id_length_limitLimit id to this many characters (minimum 6).
Set to 0 for unlimited length.
Set to null for keep the existing setting, which defaults to 0.
Does not affect id_full.		numbernullno
import_profile_nameAWS Profile name to use when importing a resourcestringnullno
import_role_arnIAM Role ARN to use when importing a resourcestringnullno
ip_set_reference_statement_rulesA rule statement used to detect web requests coming from particular IP addresses or address ranges.

action:
The action that AWS WAF should take on a web request when it matches the rule's statement.
name:
A friendly name of the rule.
priority:
If you define more than one Rule in a WebACL,
AWS WAF evaluates each request against the rules in order based on the value of priority.
AWS WAF processes rules with lower priority first.

statement:
arn:
The ARN of the IP Set that this statement references.
ip_set_forwarded_ip_config:
fallback_behavior:
The match status to assign to the web request if the request doesn't have a valid IP address in the specified position.
Possible values: MATCH, NO_MATCH
header_name:
The name of the HTTP header to use for the IP address.
position:
The position in the header to search for the IP address.
Possible values include: FIRST, LAST, or ANY.

visibility_config:
Defines and enables Amazon CloudWatch metrics and web request sample collection.

cloudwatch_metrics_enabled:
Whether the associated resource sends metrics to CloudWatch.
metric_name:
A friendly name of the CloudWatch metric.
sampled_requests_enabled:
Whether AWS WAF should store a sampling of the web requests that match the rules.		list(any)nullno
label_key_caseControls the letter case of the tags keys (label names) for tags generated by this module.
Does not affect keys of tags passed in via the tags input.
Possible values: lower, title, upper.
Default value: title.		stringnullno
label_orderThe order in which the labels (ID elements) appear in the id.
Defaults to ["namespace", "environment", "stage", "name", "attributes"].
You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present.		list(string)nullno
label_value_caseControls the letter case of ID elements (labels) as included in id,
set as tag values, and output by this module individually.
Does not affect values of tags passed in via the tags input.
Possible values: lower, title, upper and none (no transformation).
Set this to title and set delimiter to "" to yield Pascal Case IDs.
Default value: lower.		stringnullno
labels_as_tagsSet of labels (ID elements) to include as tags in the tags output.
Default is to include all labels.
Tags with empty values will not be included in the tags output.
Set to [] to suppress all generated tags.
Notes:
The value of the name tag, if included, will be the id, not the name.
Unlike other null-label inputs, the initial setting of labels_as_tags cannot be
changed in later chained modules. Attempts to change it will be silently ignored.		set(string)
[
  "default"
]
no
log_destination_configsThe Amazon Kinesis Data Firehose ARNs.list(string)[]no
managed_rule_group_statement_rulesA rule statement used to run the rules that are defined in a managed rule group.

name:
A friendly name of the rule.
priority:
If you define more than one Rule in a WebACL,
AWS WAF evaluates each request against the rules in order based on the value of priority.
AWS WAF processes rules with lower priority first.

override_action:
The override action to apply to the rules in a rule group.
Possible values: count, none

statement:
name:
The name of the managed rule group.
vendor_name:
The name of the managed rule group vendor.
excluded_rule:
The list of names of the rules to exclude.

visibility_config:
Defines and enables Amazon CloudWatch metrics and web request sample collection.

cloudwatch_metrics_enabled:
Whether the associated resource sends metrics to CloudWatch.
metric_name:
A friendly name of the CloudWatch metric.
sampled_requests_enabled:
Whether AWS WAF should store a sampling of the web requests that match the rules.		list(any)nullno
nameID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.
This is the only ID element not also included as a tag.
The "name" tag is set to the full id string. There is no tag with the value of the name input.		stringnullno
namespaceID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally uniquestringnullno
rate_based_statement_rulesA rate-based rule tracks the rate of requests for each originating IP address,
and triggers the rule action when the rate exceeds a limit that you specify on the number of requests in any 5-minute time span.

action:
The action that AWS WAF should take on a web request when it matches the rule's statement.
name:
A friendly name of the rule.
priority:
If you define more than one Rule in a WebACL,
AWS WAF evaluates each request against the rules in order based on the value of priority.
AWS WAF processes rules with lower priority first.

statement:
aggregate_key_type:
Setting that indicates how to aggregate the request counts.
Possible values include: FORWARDED_IP or IP
limit:
The limit on requests per 5-minute period for a single originating IP address.
forwarded_ip_config:
fallback_behavior:
The match status to assign to the web request if the request doesn't have a valid IP address in the specified position.
Possible values: MATCH, NO_MATCH
header_name:
The name of the HTTP header to use for the IP address.

visibility_config:
Defines and enables Amazon CloudWatch metrics and web request sample collection.

cloudwatch_metrics_enabled:
Whether the associated resource sends metrics to CloudWatch.
metric_name:
A friendly name of the CloudWatch metric.
sampled_requests_enabled:
Whether AWS WAF should store a sampling of the web requests that match the rules.		list(any)nullno
redacted_fieldsThe parts of the request that you want to keep out of the logs.
method_enabled:
Whether to enable redaction of the HTTP method.
The method indicates the type of operation that the request is asking the origin to perform.
uri_path_enabled:
Whether to enable redaction of the URI path.
This is the part of a web request that identifies a resource.
query_string_enabled:
Whether to enable redaction of the query string.
This is the part of a URL that appears after a ? character, if any.
single_header:
The list of names of the query headers to redact.		map(any){}no
regex_pattern_set_reference_statement_rulesA rule statement used to search web request components for matches with regular expressions.

action:
The action that AWS WAF should take on a web request when it matches the rule's statement.
name:
A friendly name of the rule.
priority:
If you define more than one Rule in a WebACL,
AWS WAF evaluates each request against the rules in order based on the value of priority.
AWS WAF processes rules with lower priority first.

statement:
arn:
The Amazon Resource Name (ARN) of the Regex Pattern Set that this statement references.
field_to_match:
The part of a web request that you want AWS WAF to inspect.
See https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/wafv2_web_acl#field-to-match
text_transformation:
Text transformations eliminate some of the unusual formatting that attackers use in web requests in an effort to bypass detection.
See https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/wafv2_web_acl#text-transformation

visibility_config:
Defines and enables Amazon CloudWatch metrics and web request sample collection.

cloudwatch_metrics_enabled:
Whether the associated resource sends metrics to CloudWatch.
metric_name:
A friendly name of the CloudWatch metric.
sampled_requests_enabled:
Whether AWS WAF should store a sampling of the web requests that match the rules.		list(any)nullno
regex_replace_charsTerraform regular expression (regex) string.
Characters matching the regex will be removed from the ID elements.
If not set, "/[^a-zA-Z0-9-]/" is used to remove all characters other than hyphens, letters and digits.		stringnullno
regionAWS Regionstringn/ayes
rule_group_reference_statement_rulesA rule statement used to run the rules that are defined in an WAFv2 Rule Group.

action:
The action that AWS WAF should take on a web request when it matches the rule's statement.
name:
A friendly name of the rule.
priority:
If you define more than one Rule in a WebACL,
AWS WAF evaluates each request against the rules in order based on the value of priority.
AWS WAF processes rules with lower priority first.

override_action:
The override action to apply to the rules in a rule group.
Possible values: count, none

statement:
arn:
The ARN of the aws_wafv2_rule_group resource.
excluded_rule:
The list of names of the rules to exclude.

visibility_config:
Defines and enables Amazon CloudWatch metrics and web request sample collection.

cloudwatch_metrics_enabled:
Whether the associated resource sends metrics to CloudWatch.
metric_name:
A friendly name of the CloudWatch metric.
sampled_requests_enabled:
Whether AWS WAF should store a sampling of the web requests that match the rules.		list(any)nullno
scopeSpecifies whether this is for an AWS CloudFront distribution or for a regional application.
Possible values are CLOUDFRONT or REGIONAL.
To work with CloudFront, you must also specify the region us-east-1 (N. Virginia) on the AWS provider.		string"REGIONAL"no
size_constraint_statement_rulesA rule statement that uses a comparison operator to compare a number of bytes against the size of a request component.

action:
The action that AWS WAF should take on a web request when it matches the rule's statement.
name:
A friendly name of the rule.
priority:
If you define more than one Rule in a WebACL,
AWS WAF evaluates each request against the rules in order based on the value of priority.
AWS WAF processes rules with lower priority first.

statement:
comparison_operator:
The operator to use to compare the request part to the size setting.
Possible values: EQ, NE, LE, LT, GE, or GT.
size:
The size, in bytes, to compare to the request part, after any transformations.
Valid values are integers between 0 and 21474836480, inclusive.
field_to_match:
The part of a web request that you want AWS WAF to inspect.
See https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/wafv2_web_acl#field-to-match
text_transformation:
Text transformations eliminate some of the unusual formatting that attackers use in web requests in an effort to bypass detection.
See https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/wafv2_web_acl#text-transformation

visibility_config:
Defines and enables Amazon CloudWatch metrics and web request sample collection.

cloudwatch_metrics_enabled:
Whether the associated resource sends metrics to CloudWatch.
metric_name:
A friendly name of the CloudWatch metric.
sampled_requests_enabled:
Whether AWS WAF should store a sampling of the web requests that match the rules.		list(any)nullno
sqli_match_statement_rulesAn SQL injection match condition identifies the part of web requests,
such as the URI or the query string, that you want AWS WAF to inspect.

action:
The action that AWS WAF should take on a web request when it matches the rule's statement.
name:
A friendly name of the rule.
priority:
If you define more than one Rule in a WebACL,
AWS WAF evaluates each request against the rules in order based on the value of priority.
AWS WAF processes rules with lower priority first.

statement:
field_to_match:
The part of a web request that you want AWS WAF to inspect.
See https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/wafv2_web_acl#field-to-match
text_transformation:
Text transformations eliminate some of the unusual formatting that attackers use in web requests in an effort to bypass detection.
See https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/wafv2_web_acl#text-transformation

visibility_config:
Defines and enables Amazon CloudWatch metrics and web request sample collection.

cloudwatch_metrics_enabled:
Whether the associated resource sends metrics to CloudWatch.
metric_name:
A friendly name of the CloudWatch metric.
sampled_requests_enabled:
Whether AWS WAF should store a sampling of the web requests that match the rules.		list(any)nullno
ssm_path_prefixSSM path prefix (with leading but not trailing slash) under which to store all WAF infostring"/waf"no
stageID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release'stringnullno
tagsAdditional tags (e.g. {'BusinessUnit': 'XYZ'}).
Neither the tag keys nor the tag values will be modified by this module.		map(string){}no
tenantID element _(Rarely used, not included by default)_. A customer identifier, indicating who this instance of a resource is forstringnullno
visibility_configDefines and enables Amazon CloudWatch metrics and web request sample collection.

cloudwatch_metrics_enabled:
Whether the associated resource sends metrics to CloudWatch.
metric_name:
A friendly name of the CloudWatch metric.
sampled_requests_enabled:
Whether AWS WAF should store a sampling of the web requests that match the rules.		map(string){}no
xss_match_statement_rulesA rule statement that defines a cross-site scripting (XSS) match search for AWS WAF to apply to web requests.

action:
The action that AWS WAF should take on a web request when it matches the rule's statement.
name:
A friendly name of the rule.
priority:
If you define more than one Rule in a WebACL,
AWS WAF evaluates each request against the rules in order based on the value of priority.
AWS WAF processes rules with lower priority first.

xss_match_statement:
field_to_match:
The part of a web request that you want AWS WAF to inspect.
See https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/wafv2_web_acl#field-to-match
text_transformation:
Text transformations eliminate some of the unusual formatting that attackers use in web requests in an effort to bypass detection.
See https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/wafv2_web_acl#text-transformation

visibility_config:
Defines and enables Amazon CloudWatch metrics and web request sample collection.

cloudwatch_metrics_enabled:
Whether the associated resource sends metrics to CloudWatch.
metric_name:
A friendly name of the CloudWatch metric.
sampled_requests_enabled:
Whether AWS WAF should store a sampling of the web requests that match the rules.		list(any)nullno

Outputs​

NameDescription
wafInformation about the created WAF ACL

References​