The following appendix provides links to various Linux security and system administration tools. Some are essential, some are merely interesting, but nearly all are free.
Tool or Resource: Abacus Project
Keywords: Network monitoring
Description: The Abacus Project offers several tools for logging, intrusion detection, and general system management. Of these, the most interesting is
HostSentry. Its author describes it as a host-based login anomaly detection and response tool. Other Abacus Project tools analyze logs and defend against port scan attacks in real-time.
Tool or Resource:
Keywords: Network news access
Notes: Requires Java.