APPENDIX B. AUDIT SYSTEM REFERENCE
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/security_guide/app-Audit_Reference#sec-Audit_Events_Fields
https://elixir.bootlin.com/linux/latest/source/kernel/audit.c
https://elixir.bootlin.com/linux/latest/source/include/uapi/linux/audit.h
/* The netlink messages for the audit system is divided into blocks:
- 1000 - 1099 are for commanding the audit system
- 1100 - 1199 user space trusted application messages
- 1200 - 1299 messages internal to the audit daemon
- 1300 - 1399 audit event messages
- 1400 - 1499 SE Linux use
- 1500 - 1599 kernel LSPP events
- 1600 - 1699 kernel crypto events
- 1700 - 1799 kernel anomaly records
- 1800 - 1899 kernel integrity events
- 1900 - 1999 future kernel use
- 2000 is for otherwise unclassified kernel audit messages (legacy)
- 2001 - 2099 unused (kernel)
- 2100 - 2199 user space anomaly records
- 2200 - 2299 user space actions taken in response to anomalies
- 2300 - 2399 user space generated LSPP events
- 2400 - 2499 user space crypto events
- 2500 - 2999 future user space (maybe integrity labels and related events)
- Messages from 1000-1199 are bi-directional. 1200-1299 & 2100 - 2999 are
- exclusively user space. 1300-2099 is kernel --> user space
- communication.
*/
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