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IBM strongly advises upgrading as soon as possible.
APAR: DT469107

Affected VersionsFixed in Release
IBM DataPower Gateway 11.0.0 11.0.0.0 - 11.0.0.111.0.0.2
IBM DataPower Gateway 10.5.0 10.5.0.0 - 10.5.0.2110.5.0.22
IBM DataPower Gateway 10.6.0 10.6.0.0 - 10.6.0.910.6.0.10
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Disable persistent connections to an XML Firewall service or don't set the X-Client-IP header on the client request.

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