NEC Express 5800 User Manual page 376

If you have installed "SSL Certificate Data" in the function of "SSL Certificate", the management
PC communicates with each Web Console by encryption mode via the HTTPS. Warning
regarding security certificate may appear when connecting to Web Console.
Click "Continue" button to move the login page of each Web Console.
* Warning message may be deffernrt by the IE version.
If Java console does not launch because of IE ESC security block, please run either of following
settings.
Select "Internet" in Security tab and click "Site" button, add web console IP address.

 Select "Trusted sites" in Security tab and click "Site" button, add web console IP address.
NOTE:
To avoid this warning, please install the certificate and the private
key.
IMPORTANT:
 If you use Internet Explorer browser(IE), please make sure that
the following settings is un-checked. If this setting is enabled,
you may fail to start the function of KVMs Redirection(Java
console) with the message of "Could not download
jviewer_jnlp".

"Advanced" tab -> "Security" → "Do not save encrypted
pages to disk" item in "Security" settings.
 If you have not ever installed "SSL Certificate" Data, you can't
connect to Web Console via the HTTPS. For how to install the
"SSL Certificate", reffer section 1.4.4.
376