If you change the hostname of a cluster node, you must change the address from which SunPlex Manager runs. The default security certificate is generated based on the node's hostname at the time SunPlex Manager is installed. To reset the node's hostname, delete the certificate file, keystore and restart SunPlex Manager. SunPlex Manager will automatically create a new certificate file with the new hostname. You must complete this procedure on any node that has had its hostname changed.