if in == nil || in.MatchType == nil {
		return true
	}

	catchall := false

	switch m := in.MatchType.(type) {
	case *networking.StringMatch_Regex:
		// `*` is NOT a RE2 style regex, it's a metacharacter.
		// It will be translated as present_match, rather than matching "any string".
		// see https://github.com/istio/istio/pull/20629
		catchall = m.Regex == "*"
	}

	return catchall
}