class Aws::WAFV2::Types::RateBasedStatement

A 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. You can use this to put a temporary block on requests from an IP address that is sending excessive requests.

When the rule action triggers, WAF blocks additional requests from the IP address until the request rate falls below the limit.

You can optionally nest another statement inside the rate-based statement, to narrow the scope of the rule so that it only counts requests that match the nested statement. For example, based on recent requests that you have seen from an attacker, you might create a rate-based rule with a nested AND rule statement that contains the following nested statements:

In this rate-based rule, you also define a rate limit. For this example, the rate limit is 1,000. Requests that meet both of the conditions in the statements are counted. If the count exceeds 1,000 requests per five minutes, the rule action triggers. Requests that do not meet both conditions are not counted towards the rate limit and are not affected by this rule.

You cannot nest a `RateBasedStatement`, for example for use inside a `NotStatement` or `OrStatement`. It can only be referenced as a top-level statement within a rule.

@note When making an API call, you may pass RateBasedStatement

data as a hash:

    {
      limit: 1, # required
      aggregate_key_type: "IP", # required, accepts IP, FORWARDED_IP
      scope_down_statement: {
        byte_match_statement: {
          search_string: "data", # required
          field_to_match: { # required
            single_header: {
              name: "FieldToMatchData", # required
            },
            single_query_argument: {
              name: "FieldToMatchData", # required
            },
            all_query_arguments: {
            },
            uri_path: {
            },
            query_string: {
            },
            body: {
            },
            method: {
            },
            json_body: {
              match_pattern: { # required
                all: {
                },
                included_paths: ["JsonPointerPath"],
              },
              match_scope: "ALL", # required, accepts ALL, KEY, VALUE
              invalid_fallback_behavior: "MATCH", # accepts MATCH, NO_MATCH, EVALUATE_AS_STRING
            },
          },
          text_transformations: [ # required
            {
              priority: 1, # required
              type: "NONE", # required, accepts NONE, COMPRESS_WHITE_SPACE, HTML_ENTITY_DECODE, LOWERCASE, CMD_LINE, URL_DECODE, BASE64_DECODE, HEX_DECODE, MD5, REPLACE_COMMENTS, ESCAPE_SEQ_DECODE, SQL_HEX_DECODE, CSS_DECODE, JS_DECODE, NORMALIZE_PATH, NORMALIZE_PATH_WIN, REMOVE_NULLS, REPLACE_NULLS, BASE64_DECODE_EXT, URL_DECODE_UNI, UTF8_TO_UNICODE
            },
          ],
          positional_constraint: "EXACTLY", # required, accepts EXACTLY, STARTS_WITH, ENDS_WITH, CONTAINS, CONTAINS_WORD
        },
        sqli_match_statement: {
          field_to_match: { # required
            single_header: {
              name: "FieldToMatchData", # required
            },
            single_query_argument: {
              name: "FieldToMatchData", # required
            },
            all_query_arguments: {
            },
            uri_path: {
            },
            query_string: {
            },
            body: {
            },
            method: {
            },
            json_body: {
              match_pattern: { # required
                all: {
                },
                included_paths: ["JsonPointerPath"],
              },
              match_scope: "ALL", # required, accepts ALL, KEY, VALUE
              invalid_fallback_behavior: "MATCH", # accepts MATCH, NO_MATCH, EVALUATE_AS_STRING
            },
          },
          text_transformations: [ # required
            {
              priority: 1, # required
              type: "NONE", # required, accepts NONE, COMPRESS_WHITE_SPACE, HTML_ENTITY_DECODE, LOWERCASE, CMD_LINE, URL_DECODE, BASE64_DECODE, HEX_DECODE, MD5, REPLACE_COMMENTS, ESCAPE_SEQ_DECODE, SQL_HEX_DECODE, CSS_DECODE, JS_DECODE, NORMALIZE_PATH, NORMALIZE_PATH_WIN, REMOVE_NULLS, REPLACE_NULLS, BASE64_DECODE_EXT, URL_DECODE_UNI, UTF8_TO_UNICODE
            },
          ],
        },
        xss_match_statement: {
          field_to_match: { # required
            single_header: {
              name: "FieldToMatchData", # required
            },
            single_query_argument: {
              name: "FieldToMatchData", # required
            },
            all_query_arguments: {
            },
            uri_path: {
            },
            query_string: {
            },
            body: {
            },
            method: {
            },
            json_body: {
              match_pattern: { # required
                all: {
                },
                included_paths: ["JsonPointerPath"],
              },
              match_scope: "ALL", # required, accepts ALL, KEY, VALUE
              invalid_fallback_behavior: "MATCH", # accepts MATCH, NO_MATCH, EVALUATE_AS_STRING
            },
          },
          text_transformations: [ # required
            {
              priority: 1, # required
              type: "NONE", # required, accepts NONE, COMPRESS_WHITE_SPACE, HTML_ENTITY_DECODE, LOWERCASE, CMD_LINE, URL_DECODE, BASE64_DECODE, HEX_DECODE, MD5, REPLACE_COMMENTS, ESCAPE_SEQ_DECODE, SQL_HEX_DECODE, CSS_DECODE, JS_DECODE, NORMALIZE_PATH, NORMALIZE_PATH_WIN, REMOVE_NULLS, REPLACE_NULLS, BASE64_DECODE_EXT, URL_DECODE_UNI, UTF8_TO_UNICODE
            },
          ],
        },
        size_constraint_statement: {
          field_to_match: { # required
            single_header: {
              name: "FieldToMatchData", # required
            },
            single_query_argument: {
              name: "FieldToMatchData", # required
            },
            all_query_arguments: {
            },
            uri_path: {
            },
            query_string: {
            },
            body: {
            },
            method: {
            },
            json_body: {
              match_pattern: { # required
                all: {
                },
                included_paths: ["JsonPointerPath"],
              },
              match_scope: "ALL", # required, accepts ALL, KEY, VALUE
              invalid_fallback_behavior: "MATCH", # accepts MATCH, NO_MATCH, EVALUATE_AS_STRING
            },
          },
          comparison_operator: "EQ", # required, accepts EQ, NE, LE, LT, GE, GT
          size: 1, # required
          text_transformations: [ # required
            {
              priority: 1, # required
              type: "NONE", # required, accepts NONE, COMPRESS_WHITE_SPACE, HTML_ENTITY_DECODE, LOWERCASE, CMD_LINE, URL_DECODE, BASE64_DECODE, HEX_DECODE, MD5, REPLACE_COMMENTS, ESCAPE_SEQ_DECODE, SQL_HEX_DECODE, CSS_DECODE, JS_DECODE, NORMALIZE_PATH, NORMALIZE_PATH_WIN, REMOVE_NULLS, REPLACE_NULLS, BASE64_DECODE_EXT, URL_DECODE_UNI, UTF8_TO_UNICODE
            },
          ],
        },
        geo_match_statement: {
          country_codes: ["AF"], # accepts AF, AX, AL, DZ, AS, AD, AO, AI, AQ, AG, AR, AM, AW, AU, AT, AZ, BS, BH, BD, BB, BY, BE, BZ, BJ, BM, BT, BO, BQ, BA, BW, BV, BR, IO, BN, BG, BF, BI, KH, CM, CA, CV, KY, CF, TD, CL, CN, CX, CC, CO, KM, CG, CD, CK, CR, CI, HR, CU, CW, CY, CZ, DK, DJ, DM, DO, EC, EG, SV, GQ, ER, EE, ET, FK, FO, FJ, FI, FR, GF, PF, TF, GA, GM, GE, DE, GH, GI, GR, GL, GD, GP, GU, GT, GG, GN, GW, GY, HT, HM, VA, HN, HK, HU, IS, IN, ID, IR, IQ, IE, IM, IL, IT, JM, JP, JE, JO, KZ, KE, KI, KP, KR, KW, KG, LA, LV, LB, LS, LR, LY, LI, LT, LU, MO, MK, MG, MW, MY, MV, ML, MT, MH, MQ, MR, MU, YT, MX, FM, MD, MC, MN, ME, MS, MA, MZ, MM, NA, NR, NP, NL, NC, NZ, NI, NE, NG, NU, NF, MP, NO, OM, PK, PW, PS, PA, PG, PY, PE, PH, PN, PL, PT, PR, QA, RE, RO, RU, RW, BL, SH, KN, LC, MF, PM, VC, WS, SM, ST, SA, SN, RS, SC, SL, SG, SX, SK, SI, SB, SO, ZA, GS, SS, ES, LK, SD, SR, SJ, SZ, SE, CH, SY, TW, TJ, TZ, TH, TL, TG, TK, TO, TT, TN, TR, TM, TC, TV, UG, UA, AE, GB, US, UM, UY, UZ, VU, VE, VN, VG, VI, WF, EH, YE, ZM, ZW
          forwarded_ip_config: {
            header_name: "ForwardedIPHeaderName", # required
            fallback_behavior: "MATCH", # required, accepts MATCH, NO_MATCH
          },
        },
        rule_group_reference_statement: {
          arn: "ResourceArn", # required
          excluded_rules: [
            {
              name: "EntityName", # required
            },
          ],
        },
        ip_set_reference_statement: {
          arn: "ResourceArn", # required
          ip_set_forwarded_ip_config: {
            header_name: "ForwardedIPHeaderName", # required
            fallback_behavior: "MATCH", # required, accepts MATCH, NO_MATCH
            position: "FIRST", # required, accepts FIRST, LAST, ANY
          },
        },
        regex_pattern_set_reference_statement: {
          arn: "ResourceArn", # required
          field_to_match: { # required
            single_header: {
              name: "FieldToMatchData", # required
            },
            single_query_argument: {
              name: "FieldToMatchData", # required
            },
            all_query_arguments: {
            },
            uri_path: {
            },
            query_string: {
            },
            body: {
            },
            method: {
            },
            json_body: {
              match_pattern: { # required
                all: {
                },
                included_paths: ["JsonPointerPath"],
              },
              match_scope: "ALL", # required, accepts ALL, KEY, VALUE
              invalid_fallback_behavior: "MATCH", # accepts MATCH, NO_MATCH, EVALUATE_AS_STRING
            },
          },
          text_transformations: [ # required
            {
              priority: 1, # required
              type: "NONE", # required, accepts NONE, COMPRESS_WHITE_SPACE, HTML_ENTITY_DECODE, LOWERCASE, CMD_LINE, URL_DECODE, BASE64_DECODE, HEX_DECODE, MD5, REPLACE_COMMENTS, ESCAPE_SEQ_DECODE, SQL_HEX_DECODE, CSS_DECODE, JS_DECODE, NORMALIZE_PATH, NORMALIZE_PATH_WIN, REMOVE_NULLS, REPLACE_NULLS, BASE64_DECODE_EXT, URL_DECODE_UNI, UTF8_TO_UNICODE
            },
          ],
        },
        rate_based_statement: {
          limit: 1, # required
          aggregate_key_type: "IP", # required, accepts IP, FORWARDED_IP
          scope_down_statement: {
            # recursive Statement
          },
          forwarded_ip_config: {
            header_name: "ForwardedIPHeaderName", # required
            fallback_behavior: "MATCH", # required, accepts MATCH, NO_MATCH
          },
        },
        and_statement: {
          statements: [ # required
            {
              # recursive Statement
            },
          ],
        },
        or_statement: {
          statements: [ # required
            {
              # recursive Statement
            },
          ],
        },
        not_statement: {
          statement: { # required
            # recursive Statement
          },
        },
        managed_rule_group_statement: {
          vendor_name: "VendorName", # required
          name: "EntityName", # required
          version: "VersionKeyString",
          excluded_rules: [
            {
              name: "EntityName", # required
            },
          ],
          scope_down_statement: {
            # recursive Statement
          },
        },
        label_match_statement: {
          scope: "LABEL", # required, accepts LABEL, NAMESPACE
          key: "LabelMatchKey", # required
        },
      },
      forwarded_ip_config: {
        header_name: "ForwardedIPHeaderName", # required
        fallback_behavior: "MATCH", # required, accepts MATCH, NO_MATCH
      },
    }

@!attribute [rw] limit

The limit on requests per 5-minute period for a single originating
IP address. If the statement includes a `ScopeDownStatement`, this
limit is applied only to the requests that match the statement.
@return [Integer]

@!attribute [rw] aggregate_key_type

Setting that indicates how to aggregate the request counts. The
options are the following:

* IP - Aggregate the request counts on the IP address from the web
  request origin.

* FORWARDED\_IP - Aggregate the request counts on the first IP
  address in an HTTP header. If you use this, configure the
  `ForwardedIPConfig`, to specify the header to use.
@return [String]

@!attribute [rw] scope_down_statement

An optional nested statement that narrows the scope of the web
requests that are evaluated by the rate-based statement. Requests
are only tracked by the rate-based statement if they match the
scope-down statement. You can use any nestable Statement in the
scope-down statement, and you can nest statements at any level, the
same as you can for a rule statement.
@return [Types::Statement]

@!attribute [rw] forwarded_ip_config

The configuration for inspecting IP addresses in an HTTP header that
you specify, instead of using the IP address that's reported by the
web request origin. Commonly, this is the X-Forwarded-For (XFF)
header, but you can specify any header name.

<note markdown="1"> If the specified header isn't present in the request, WAF doesn't
apply the rule to the web request at all.

 </note>

This is required if `AggregateKeyType` is set to `FORWARDED_IP`.
@return [Types::ForwardedIPConfig]

@see docs.aws.amazon.com/goto/WebAPI/wafv2-2019-07-29/RateBasedStatement AWS API Documentation

Constants

SENSITIVE