샘플 로그 파일:

• before.log:

2025-08-19 10:00:00 INFO: Connection from 192.168.1.10 accepted.
2025-08-19 10:05:00 WARN: Failed login attempt from 192.168.1.15.

• after.log:

2025-08-19 11:00:00 INFO: Connection from 192.168.1.10 accepted.
2025-08-19 11:05:00 WARN: Failed login attempt from 192.168.1.15.
2025-08-19 11:10:00 ERROR: Unauthorized access from 10.0.0.5.