Six Signs That You Have Been Hacked

UNKNOWN ACCOUNTS added to your system. Hackers may have created a back door onto your network.

EXCESSIVE LOG-ON FAILURES: With enough knocking, hackers can force some doors on your intranet to open--and some accounts don't automatically close after a certain number of attempts.

UNEXPECTED CRASHES or reboots of the computer. Some hacks require the addition of new code, followed by a reboot to load it. If you didn't just reboot your system, who did?

MISSING LOGS or gaps in records. Sometimes, hackers can only cover their tracks by deleting portions of files. Gaps, then, become the telltale tracks.

HEAVY TRAFFIC after midnight. Do you do a lot of communing with your Asian office? If not, think about why your midnight-to-sunrise traffic suddenly exceeds your daylight loads.

SYSTEM LOGS that quickly fill up. Each company is different, but these critical logs are usually spare because only a few people have access. If a hacker is impersonating a ''sys-op,'' you'll see it here.

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