It is important to configure these defenses to protect from attacks by both outsiders and insiders.

• Firewalls: Limit network access to the machine that runs .
• Accounts: Limit login access to the machine that runs . Centrally administer accounts using, for instance, an LDAP server.
• Physical locks: Limit physical access to the machine that runs .
• Secure traffic: Encrypt the traffic that flows on your internal network.
• File permissions: Restrict the file permissions granted to the account that launches .
• Quotas: Limit the file space and CPU that an account can consume.