Web Management is working but the Java Analysis applet fail

Web Management is working but the Java Analysis applet fails

Goal

Be able to view the Java Analysis applet

Fact

Envision is behind firewall & its ip address is translated (NAT)

enVision Core 3.7.0

Symptom

Normal web-management is ok but the Analysis applet (requiring Java) fails with the following error:

JAVA Console message:

load: class com.opensystems.ls.eventviewer.EventViewer.class not found.
java.lang.ClassNotFoundException: com.opensystems.ls.eventviewer.EventViewer.class
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: open HTTP connection failed:<http://IPADDRESS>:8080/lseventviewer/com/opensystems/ls/eventviewer/EventViewer/class.class>
at sun.plugin2.applet.Applet2ClassLoader.getBytes(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.access$000(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
Exception: java.lang.ClassNotFoundException: com.opensystems.ls.eventviewer.EventViewer.class

Fix

1. Confirm that you can access the Analysis applet when logged directly into the A-SRV.

2. Confirm Port 2010/tcp is open between the client machine and the D-SRV using telnet. If the port is not open then configure your firewalls accordingly.

3. Confirm that the NAT'd IP address is set correctly in the EnVision Administration GUI (click 'Overview' - 'System Configuration' - 'Services' - 'Setup Site Communication').

4. Make sure the Internal IP is used for the LAN interface on the EnVision Appliance and External is used if NAT is required.

5. Using Remote Desktop, connect to the existing EnVision Appliance IP Address. - Click on 'Start' - 'Control Panel' - 'Network Connections' - 'LAN' - 'Properties'. Then highlight 'Internet Protocol TCP/IP' and click 'Properties'. - Confirm this IP Address is the same as your Internal IP Address.

-Regards,

Blackhattrick blog

(Googlethewebsite.blogspot.com/blackhattrick.blogspot.com)