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    “Network Communications Lost” appears in the PowerChute Business Edition Console after upgrading the JRE version of PowerChute Business Edition Agent with JRE Configuration Tool

    Issue:
    Upgrading the JRE version of the PowerChute Business Edition Agent via the JRE Configuration Tool runs as expected and the service/daemon is restarted successfully. A “Network Communications Lost” message appears in the PowerChute Business Edition Console after the service/daemon has been restarted.  

    Product Line: 
    PowerChute Business Edition versions 9.0, 9.0.1, 9.1.0, 9.0.2, 9.1.1, 9.0.3, 9.0.4, 9.2.0, 9.2.1

    Environment:
    OS: Linux, Solaris, Windows x64, x86

    Cause:
    The latest release of Java JRE 8u60 (and greater) contains a security update which prevents communication between the PowerChute Business Edition Server and the PowerChute Business Edition Agent.

    Solution:
    After upgrading the Java JRE version to 8u60 (or greater), perform the following steps:

    1.  Stop the PowerChute Business Edition Agent service/daemon.

    Windows:          
    net stop apcpbeagent

    Linux:   
    /etc/init.d/PBEAgent stop

    2.  In the Powerchute JRE folder, open the file lib\security\java.security using a text editor.

    Sample JRE locations –
    Windows x86:
    C:\Program Files\APC\PowerChute Business Edition\JreConfigTool\1.8.0_60

    Windows x64:
    C:\Program Files (x86)\APC\PowerChute Business Edition\JreConfigTool\1.8.0_60

    Linux:
    /usr/java/jre1.8.0_60 (Default Java JRE install directory)

    Go to the line containing the jdk.tls.disabledAlgorithms setting and carry out the following:
     
    1. Remove RC4 as a disabledAlgorithm
    2. Change DH keysize restriction from 768 to 256

    Original:             
    jdk.tls.disabledAlgorithms=SSLv3, RC4, DH keySize < 768

    New:                    
    jdk.tls.disabledAlgorithms=SSLv3, DH keySize < 256

    3. The following step needs to be carried out for PowerChute Business Edition Agent versions 9.0 and 9.0.1 if it is managed by a Powerchute Business Edition Console/Server.
    In the Powerchute JRE folder, open the lib\security\java.security using a text editor.

    Sample JRE locations –

    Windows x86:
    C:\Program Files\APC\PowerChute Business Edition\JreConfigTool\1.8.0_60

    Windows x64:
    C:\Program Files (x86)\APC\PowerChute Business Edition\JreConfigTool\1.8.0_60

    Linux:
    /usr/java/jre1.8.0_60 (Default Java JRE install directory)
    Go to the line (should be at the end of the file) containing the jdk.tls.legacyAlgorithms setting and remove ‘RC_128,’ from it:

    Original:
    jdk.tls.legacyAlgorithms= \
                    K_NULL, C_NULL, M_NULL, \
                    DHE_DSS_EXPORT, DHE_RSA_EXPORT, DH_anon_EXPORT, DH_DSS_EXPORT, \
                    DH_RSA_EXPORT, RSA_EXPORT, \
                    DH_anon, ECDH_anon, \
                    RC4_128, RC4_40, DES_CBC, DES40_CBC

    New:    
    jdk.tls.legacyAlgorithms= \
                    K_NULL, C_NULL, M_NULL, \
                    DHE_DSS_EXPORT, DHE_RSA_EXPORT, DH_anon_EXPORT, DH_DSS_EXPORT, \
                    DH_RSA_EXPORT, RSA_EXPORT, \
                    DH_anon, ECDH_anon, \
                    RC4_40, DES_CBC, DES40_CBC

                    
    4.  Start the PowerChute Business Edition Agent service/daemon

    Windows:          
    net start apcpbeagent

    Linux:   
    /etc/init.d/PBEAgent start
     

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