Starting with Java 7 Update 51, your default Java Security Settings don’t allow applications that are not signed (Unsigned), Self-signed (not signed by trusted authority) and/or missing permission attributes. Because of this enhanced security, the IP-KVM Java app gets blocked with this error:

How-To Fix:

Windows:

1. Download and open this file: exception.txt
2. On your PC, navigate in file explorer to C:\users\%username%\appdata\LocalLow\Sun\Java\Deployment\security
3. Open exception.sites in notepad.
4. Copy the content from exception.txt and paste it at the end of the exception.sites file.
5. Save the file.

MacOS:

1. Download and open this file: exception.txt
2. On your Mac, navigate in Finder to /Users/*/Library/Application Support/Oracle/Java/Deployment/security
3. Open exception.sites in TextEdit.
4. Copy the content from exception.txt and paste it at the end of the exception.sites file.
5. Save the file.