Configure or enable/disable TLS on ESXi server

•  Login to vCenter server Appliance using root credential.

• Go to path: /usr/lib/vmware-TlsReconfigurator/EsxTlsReconfigurator

• To Enable TLS 1.2 only to all ESXI hosts under a cluster:

       ./reconfigureEsx vCenterCluster -c <Cluster_Name> -u <Administrative_User> -p TLSv1.2

        :Vcenter server user name for ex:administrator@vsphere.local

• To Enable TLS 1.1,1.2 only to a specific host under the vCenter server:

    ./reconfigureEsx vCenterCluster -h <ESXI_host_Name> -u <Administrative_User> -p TLSv1.1                 TLSv1.2

     :Vcenter server user name for ex:administrator@vsphere.local

• Reboot ESXI host to commit the protocol change.

• verify the TLS enabled version  

        [root@R:~] openssl ciphers -v | awk '{print $2}' | sort | uniq
        SSLv3
        TLSv1.2
        [root@R:~]