iDRAC6 – virtual console :: connection failed

Somehow, from somewhere, my virtual console stopped connecting. The java console showed the following messages:
Missing Application-Name manifest attribute for: https://***.***.***.***:443/software/avctKVM.jar
jan 18, 2017 3:41:48 PM java.util.prefs.WindowsPreferences
WARNING: Could not open/create prefs root node Software\JavaSoft\Prefs at root 0x80000002. Windows RegCreateKeyEx(…) returned error code 5.
01/18/2017 03:41:49:004: Starting client.
====setPowerMenuStatus: (##2)
01/18/2017 03:41:51:018: Connection failed.

Pretty cryptic, huh!? And good luck trying to find a solution through google…
Of course, mine was the case: “..but it worked last week!”
Than I remembered, that I had installed HitmanPro.Alert. Could it be… No! surely not.

Well, of course it was and don’t call me Shirley!

Using the advanced interface, under “Risk reduction”, click the icon that looks like fusion between the CMD and network share icon. This is the “Network lockdown – command-and-control” option. When this is active, connection to/via the virtual console is prohibited.