Hitachi Compute Blade 500 Series Remote Console Users Manual page 20

Java Runtime Environment (JRE) version 7 update21 or later
Use JRE version in which the security policy is not changed. When you enable
connection via SSL/TLS, use JRE 7 Update 2 or later.
Set the security level to Medium
Start Java Control Panel, and move the security level slider to Medium.
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Remote console overview
Hitachi Compute Blade 500 Series Remote Console User's Guide