--- /dev/null
+**Phase 1: Completed pre-decoding.
+ full event: 'Jul 5 12:13:15 lili su[2614]: Authentication failed for root'
+ hostname: 'melancia'
+ program_name: '(null)'
+ log: 'Jul 5 12:13:15 lili su[2614]: Authentication failed for root'
+
+**Phase 2: Completed decoding.
+ No decoder matched.
+
+**Phase 3: Completed filtering (rules).
+ Rule id: '2501'
+ Level: '5'
+ Description: 'User authentication failure.'
+**Alert to be generated.
+
+