Configuring Java to work with Dell & Avocent KVMoIP

By Craig | Category: How To

As of Java version 7 onwards, the Java development team continue to make security “improvements” that inadvertently play havoc with Java embedded devices such as the web GUI’s on Dell & Avocent KVMoIP switches.

This article will guide you through the process of tweaking your Java settings to work with Dell KVMoIP appliances, such as 2161DS & 2161DS2 KVMoIP units.


1) The source computer/laptop connecting to the KVMoIP appliance must be Linux or Windows based, MAC is not officially supported
2.) You must have administrator/root/superuser access to the aforementioned computer/laptop above!
3.) You need an up-to-date install of the Java Run-time Environment

Step 1 – Modify ‘’ File: 

4.) On a Windows device, find and open the file ‘’ in Program Files (x86) > Java > jreX.X.X_X > lib > security > (X being your Java version so may differ!
5.) On a Linux device, find and open the file ‘’ in /etc/java-7-openjdk/security/
6.) Now look for a non commented out line that begins ‘jdk.tls.disabledAlgorithms’ comment it out and underneath it add a new line with:

jdk.tls.disabledAlgorithms=SSLv3, EC, ECDHE, ECDH

7.) Save and exit the file

Step 2 – White List KVM IP’s

8.) Please add ‘http’ and ‘https’ white list entries into the ‘Security’ tab in your Java control panel for the KVM IP addresses

Step 3 – Re-launch the Java Run-time Environment

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