Detect insider threats with Linux auditing
Organizations of all sizes need to mitigate the risk of insider threats. Misconduct by authorized users represents a grave threat to an organization. According to the 2005 Computer Security Institute and Federal Bureau of Investigation Computer Crime and Security Survey, organizations reported that computer intrusions from inside sources accounted for nearly half of all incidents. You can secure your network perimeter with intrusion detection systems, firewalls, and virus scanners, but don't neglect to monitor authorized users. The Linux Audit daemon can help you detect violations of your security policies.
The term auditing has multiple meanings within the information security field. A security audit is a term used to describe the process of evaluating the security posture of an organization through penetration testing, review of security policies, and system configuration. At the system level, auditing refers to the logging of the actions of users and programs of a system. The latter form of auditing is the type of auditing implemented by the Linux Audit daemon. It is a passive security measure because it only detects violations of security policy, but does not enforce it. It is similar to network-based intrusion detection systems and host-based intrusion detection systems.