100's of logon errors for MSFTPSVC, event id: 100

Running SBS 2003 Premium, ISA 2004, SQL, WSUS, 2 NIC's and a router,
Symantec Backup Exec 11d, dynamic IP, DDNS service through dyndns.org.
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Checking the weekly Server Report I saw this. Checked the System Log and
saw this over and over again. Seems to be running every 2 seconds and goes
back to at least 11 April (end of my log). What do I check? Am I being
hacked?

--
Mike Webb
Platte River Whooping Crane Maintenance Trust, Inc.
a 501 (c)(3) conservation non-profit organization


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