Use the request's JA4 fingerprint derived from the TLS Client Hello of an incoming request as an aggregate key. If you use a single JA4 fingerprint as your custom key, then each value fully defines an aggregation instance.
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- FallbackBehavior
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The match status to assign to the web request if there is insufficient TSL Client Hello information to compute the JA4 fingerprint.
You can specify the following fallback behaviors:
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MATCH- Treat the web request as matching the rule statement. AWS WAF applies the rule action to the request. -
NO_MATCH- Treat the web request as not matching the rule statement.
Type: String
Valid Values:
MATCH | NO_MATCHRequired: Yes
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See Also
For more information about using this API in one of the language-specific AWS SDKs, see the following:
