Which of the following will help detect changes made by an
intruder to the system log of a server?
A. Mirroring of the system log on another server
B. Simultaneously duplicating the system log on a write-once
disk
C. Write protecting the directory containing the system log
D. Storing the backup of the system log offsite
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Answer: B
A write-once CD cannot be overwritten. Therefore, the system
log duplicated on the disk could be compared to the original
log to detect differences, which could be the result of
changes made by an intruder. Write protecting the system log
does not prevent deletion or modification, since the
superuser can override the write protection. Backup and
mirroring may overwrite earlier files and may not be current.
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