3.1.2 Isolated Local Network

An isolated local network consists of servers that are connected in an environment which has no connection to any other network. In this model, there is zero network connectivity to a larger internal network or the Internet. Since there is no potential for remote exploits from a large number of unknown sources, this environment provides well defined physical, network and security characteristics.

By definition, access to this configuration is limited to personnel with access to the trusted admin hosts (including Oracle Enterprise Manager or Oracle VM Manager) on the closed, local network. Threats consist of an accidental "convenience" connection being made to other networks or a trusted admin installing an unsigned package or application that may introduce a malware agent.

Guidelines for the isolated local network model:

  • Set all default passwords for uniqueness and complexity. For using the High Availability and Virtual IP features where the master role may be moved to any node, ensure that the Oracle VM Agent password on each one is complex, but identical across the server pool.

  • Limit physical Oracle VM Server(dom0) and Oracle VM Manager access to essential personnel.

  • Avoid installing untrusted 3rd party software.

  • If clustering with NFS shared storage, or exporting OCFS2 repositories for backup, make sure the storage network is also restricted to the cluster subnet, especially since the documented export with root_no_squash represents a potential exposure.