Microsoft CIFS(TCP) Close Connection

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I'm using SBS 2004. I got the following message in my log.

Destination port: 445 Protocol: Microsoft CIFS(TCP) Action: Initiated
Connection


Destination Port: 445 Protocol: Microsoft CIFS (TCP) Action: Closed
Connection.


I already ensure that the access rule is set up for port 445 and ensure

the destination being "LocalHost". I have 2 rules for this.. One is
the system. The other one is standard access rule.


What could cause this port open and closed immediatley?


Does this "open and close" has anything to do with Certificate?
I didn't set the certificate up yet.


Thanks in advance,


PL

.

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