positionalConstraint

The area within the portion of the web request that you want AWS WAF to search for SearchString . Valid values include the following: CONTAINS The specified part of the web request must include the value of SearchString , but the location doesn't matter. CONTAINS_WORD The specified part of the web request must include the value of SearchString , and SearchString must contain only alphanumeric characters or underscore (A-Z, a-z, 0-9, or _). In addition, SearchString must be a word, which means that both of the following are true:

• SearchString is at the beginning of the specified part of the web request or is preceded by a character other than an alphanumeric character or underscore (_). Examples include the value of a header and ;BadBot .

• SearchString is at the end of the specified part of the web request or is followed by a character other than an alphanumeric character or underscore (_), for example, BadBot; and -BadBot; . EXACTLY The value of the specified part of the web request must exactly match the value of SearchString . STARTS_WITH The value of SearchString must appear at the beginning of the specified part of the web request. ENDS_WITH The value of SearchString must appear at the end of the specified part of the web request.