Problem: The remote console feature of a Dell R710 server does not open with an Linux client with errors like these:
Connection failed, Unsigned Java Applett, etc
Solution: I had to change three things:
in /usr/lib/jvm/java-8-openjdk-amd64/jre/lib/security/java.security I had to change to these lines:
# from
# jdk.jar.disabledAlgorithms=MD2, MD5, RSA keySize < 1024, DSA keySize < 1024
# to
jdk.jar.disabledAlgorithms=MD2, RSA keySize < 1024, DSA keySize < 1024
# from
#jdk.tls.disabledAlgorithms=SSLv3, RC4, DES, MD5withRSA, DH keySize < 1024, EC keySize < 224, 3DES_EDE_CBC, anon, NULL
# to
jdk.tls.disabledAlgorithms=RC4, DES, MD5withRSA, DH keySize < 1024, EC keySize < 224, 3DES_EDE_CBC, anon, NULL
And in ~/.java/deployment/deployment.properties I changed these lines:
# from
#deployment.security.level=MEDIUM
# to
deployment.security.level=ALLOW_UNSIGNED
And there is still a small bug: cursor keys won’t work, but numpad cursor keys do.