sun.security.ssl.allowUnsafeRenegotiation

Does the option "-Dsun.security.ssl.allow开发者_运维知识库UnsafeRenegotiation=true" work in IBM's JVM that ships with WebSphere 7

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No. What would work is

com.ibm.jsse2.renegotiate=none

But even this option works only after you install the actualy fixes for the renegotiating vulnerabilities. The level with the required fixes is SR6.