At some point, I had to remote on one of the ancient IBM Remote Supervisor Adapter II consoles, and it turned out that it was not updated since 2009. It was running an ancient version of Java KVM, so I had to do some magic to make it work due to the java security permissions.
For me, it was an error about a weak signature algorithm MD5withRSA.
First what you need to have installed is java v7 or below, as with java 8, it won’t work at all. You can find it here – https://www.oracle.com/java/technologies/javase/javase7-archive-downloads.html
You need to download x86 and install them.
After that go to java security settings and change security to medium and add RSA’s IP to the trustees
Next – check that there are no newer versions installed on your machine.
And the last step – you need to change java setting files located here:
For the java.policy file – add permission java.security.AllPermission; at the end.
For the java.security – change jdk.certpath.disabledAlgorithms to have only DSA.
After those changes, restart IE and you should be good to go!