Security Audits - 2000 Server

I'm trying to learn how to read the Security Audits in Event Viewer on a SBS2000 server.
I need to know more about some messages I see often, and what I should be doing to resolve them. Here are the ones I need.

1. This one constantly shows up from different IPs...
---------------------------
Category: Account Logon
Event: 677
Type: Failure Audit

Service Ticket Request Failed:
       User Name:      
       User Domain:      
       Service Name:      krbtgt/OVATION.LOCAL
       Ticket Options:      0x2
       Failure Code:      0x20
       Client Address:      192.168.40.79


2. This one happens a lot as well...
--------------------
Category: Account Logon
Event: 675
Type: Failure Audit

Pre-authentication failed:
       User Name:            jsmith
       User ID:             OVATION\jsmith
       Service Name:            krbtgt/OVATION
       Pre-Authentication Type:      0x2
       Failure Code:            0x18
       Client Address:            192.168.40.79

^^ those are the main two that constantly show up...if I can get some help on exactly what's going on and how I can resolve the issue, I'll then post some more events in another question...thanks!
LVL 20
DVation191Asked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

jimwassonCommented:
Have you been to eventid.net? They have a lot of free info on Windows events.

For event 677 you can review comments at:
http://www.eventid.net/display.asp?eventid=677&eventno=4&source=Security&phase=1

For event 675 you can review comments at:
http://www.eventid.net/display.asp?eventid=675&eventno=62&source=Security&phase=1
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
DVation191Author Commented:
if i am reading it correctly, those events are common and part of kerberos expiration. annoying. oh well, thanks.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Security

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.