The IPS (Intrusion Prevention System) feature monitors all system and API calls and blocks those that might result in malicious activity. Host Intrusion Prevention determines which process is using a call, the security context in which the process runs, and the resource being accessed. A kernel-level driver, which receives redirected entries in the user-mode system call table, monitors the system call chain. When calls are made, the driver compares the call request against a database of combined signatures and behavioral rules to determine whether to allow, block, or log an action.