FieldToMatch

Inspect all query arguments.

Type: AllQueryArguments object

Required: No

Inspect the request body as plain text. The request body immediately follows the request headers. This is the part of a request that contains any additional data that you want to send to your web server as the HTTP request body, such as data from a form.

AWS WAF does not support inspecting the entire contents of the web request body if the body exceeds the limit for the resource type. When a web request body is larger than the limit, the underlying host service only forwards the contents that are within the limit to AWS WAF for inspection.

For information about how to handle oversized request bodies, see the Body object configuration.

Type: Body object

Required: No

Inspect the request cookies. You must configure scope and pattern matching filters in the Cookies object, to define the set of cookies and the parts of the cookies that AWS WAF inspects.

Only the first 8 KB (8192 bytes) of a request's cookies and only the first 200 cookies are forwarded to AWS WAF for inspection by the underlying host service. You must configure how to handle any oversize cookie content in the Cookies object. AWS WAF applies the pattern matching filters to the cookies that it receives from the underlying host service.

Type: Cookies object

Required: No

Inspect a string containing the list of the request's header names, ordered as they appear in the web request that AWS WAF receives for inspection. AWS WAF generates the string and then uses that as the field to match component in its inspection. AWS WAF separates the header names in the string using colons and no added spaces, for example host:user-agent:accept:authorization:referer.

Type: HeaderOrder object

Required: No

Inspect the request headers. You must configure scope and pattern matching filters in the Headers object, to define the set of headers to and the parts of the headers that AWS WAF inspects.

Only the first 8 KB (8192 bytes) of a request's headers and only the first 200 headers are forwarded to AWS WAF for inspection by the underlying host service. You must configure how to handle any oversize header content in the Headers object. AWS WAF applies the pattern matching filters to the headers that it receives from the underlying host service.

Type: Headers object

Required: No

Available for use with Amazon CloudFront distributions and Application Load Balancers. Match against the request's JA3 fingerprint. The JA3 fingerprint is a 32-character hash derived from the TLS Client Hello of an incoming request. This fingerprint serves as a unique identifier for the client's TLS configuration. AWS WAF calculates and logs this fingerprint for each request that has enough TLS Client Hello information for the calculation. Almost all web requests include this information.

You can obtain the JA3 fingerprint for client requests from the web ACL logs. If AWS WAF is able to calculate the fingerprint, it includes it in the logs. For information about the logging fields, see Log fields in the AWS WAF Developer Guide.

Provide the JA3 fingerprint string from the logs in your string match statement specification, to match with any future requests that have the same TLS configuration.

Type: JA3Fingerprint object

Required: No

Available for use with Amazon CloudFront distributions and Application Load Balancers. Match against the request's JA4 fingerprint. The JA4 fingerprint is a 36-character hash derived from the TLS Client Hello of an incoming request. This fingerprint serves as a unique identifier for the client's TLS configuration. AWS WAF calculates and logs this fingerprint for each request that has enough TLS Client Hello information for the calculation. Almost all web requests include this information.

You can obtain the JA4 fingerprint for client requests from the web ACL logs. If AWS WAF is able to calculate the fingerprint, it includes it in the logs. For information about the logging fields, see Log fields in the AWS WAF Developer Guide.

Provide the JA4 fingerprint string from the logs in your string match statement specification, to match with any future requests that have the same TLS configuration.

Type: JA4Fingerprint object

Required: No

Inspect the request body as JSON. The request body immediately follows the request headers. This is the part of a request that contains any additional data that you want to send to your web server as the HTTP request body, such as data from a form.

AWS WAF does not support inspecting the entire contents of the web request body if the body exceeds the limit for the resource type. When a web request body is larger than the limit, the underlying host service only forwards the contents that are within the limit to AWS WAF for inspection.

For information about how to handle oversized request bodies, see the JsonBody object configuration.

Type: JsonBody object

Required: No

Inspect the HTTP method. The method indicates the type of operation that the request is asking the origin to perform.

Type: Method object

Required: No

Inspect the query string. This is the part of a URL that appears after a ? character, if any.

Type: QueryString object

Required: No

Inspect a single header. Provide the name of the header to inspect, for example, User-Agent or Referer. This setting isn't case sensitive.

Example JSON: "SingleHeader": { "Name": "haystack" }

Alternately, you can filter and inspect all headers with the Headers FieldToMatch setting.

Type: SingleHeader object

Required: No

Inspect a single query argument. Provide the name of the query argument to inspect, such as UserName or SalesRegion. The name can be up to 30 characters long and isn't case sensitive.

Example JSON: "SingleQueryArgument": { "Name": "myArgument" }

Type: SingleQueryArgument object

Required: No

Inspect fragments of the request URI. You must configure scope and pattern matching filters in the UriFragment object, to define the fragment of a URI that AWS WAF inspects.

Only the first 8 KB (8192 bytes) of a request's URI fragments and only the first 200 URI fragments are forwarded to AWS WAF for inspection by the underlying host service. You must configure how to handle any oversize URI fragment content in the UriFragment object. AWS WAF applies the pattern matching filters to the cookies that it receives from the underlying host service.

Type: UriFragment object

Required: No

Inspect the request URI path. This is the part of the web request that identifies a resource, for example, /images/daily-ad.jpg.

Type: UriPath object

Required: No