677 events

From: Peter K. (pmkdatabase@yahoo.ca)
Date: 04/21/03 

From: Peter K. <pmkdatabase@yahoo.ca>
Date: Mon, 21 Apr 2003 09:10:54 +0700

Hi,

I am getting these events at times that no one is in the office. Note
the loopback address and lack of name/domain on the first. The user
name on the second is a workstation name.

Any help in understanding and dealing with these would be most
appreciated.

Peter

Event Type: Failure Audit
Event Source: Security
Event Category: Account Logon
Event ID: 677
Date: 4/21/2003
Time: 1:58:51 AM
User: NT AUTHORITY\SYSTEM
Computer: PMCI-0X
Description:
Service Ticket Request Failed:
         User Name:
         User Domain:
         Service Name: krbtgt/JOM.PMCI.NET
         Ticket Options: 0x2
         Failure Code: 0x20
         Client Address: 127.0.0.1
==========================================
Event Type: Failure Audit
Event Source: Security
Event Category: Account Logon
Event ID: 677
Date: 4/21/2003
Time: 1:39:57 AM
User: NT AUTHORITY\SYSTEM
Computer: PMCI-0X
Description:
Service Ticket Request Failed:
         User Name: PETER3$
         User Domain: JOM.PMCI.NET
         Service Name: krbtgt/JOM.PMCI.NET
         Ticket Options: 0x2
         Failure Code: 0x20
         Client Address: 192.168.100.122