Security Audit and Monitoring components detect an attempt to violate system security. They perform predefined automatic operations in the case of a violation, such as visual warnings on a manager's screen, audible alerts, pager alerts, e-mail to the administrator. They also analyze and provide a historical log of possible security violations. Remote Authentication provides security of remote logon. This component encrypts the logon process.
Some systems use hand held devices that are required for remote login.
Some use encryption keys that are given to employees. Most only encrypt the login process while traffic is transmitted in the clear. Network Address Translation components map internal IP addresses to Internet IP addresses. These are used by organizations that wish to conceal their network's internal IP addresses from the Internet. The internal IP addresses are hidden from Internet users.