Operating system security can be enhanced for primary servers, media servers, and clients by doing the following:

• Installing operating system patches

  Operating system patches include the upgrades applied to the operating system to keep it running at the highest level of system integrity. Upgrades and patches should be kept at the level that is specified by the vendor.

• Following safe firewall procedures

• Employing least privilege administration

• Limiting root users

• Applying the security protocol over IP (IPSEC) hardware

• Turning off unused ports of the outward facing applications

• Providing a secure base on which to run NetBackup

• Adding a first line of intelligence in an investigation to determine if the operating system has been compromised

• Making sure that security implementation is the same for all operating systems

• Adding full interoperability between various systems using NBAC in a heterogenous environment