• idrac console viewer works only with java 1.7 due to security restriction on newers java (see below)

install java 1.7 on xenial 16.04

sudo add-apt-repository ppa:openjdk-r/ppa  
sudo apt-get update   
sudo apt-get install openjdk-7-jdk

/etc/java-8-oracle/security/java.security

jdk.tls.disabledAlgorithms=MD5, SSLv3, DSA, RSA keySize < 512

/etc/java-8-openjdk/security/java.security

jdk.tls.disabledAlgorithms=RC4, MD5withRSA, DH keySize < 1024, \
    EC keySize < 224, DES40_CBC, RC4_40, 3DES_EDE_CBC
jdk.tls.disabledAlgorithms=MD5, SSLv3, DSA, RSA keySize < 512

IDRAC viewer (see README inside)