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Issue with Microsoft Forefront Firewall Service stopping or Restarting in TMG

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Users will see follwing event in event viewer :

We saw that with in some situations Disabling Malware Inspection used to fix the issue but in some case we have to disable Malware Inspection + NIS

After doing the investgation we have found that issue was with one of the Antimalware signature was released and that caused issue.

So to resolve this fix is :

Re enable Malware Inspection and then Install latest defnitions from Update center in TMG Console

We can check version in registry at this location HKLM \Software\Microsoft\fpc\EmpScanner\Versions\mpasdlta.vdm  and mpavdlta.vdm , It should be above 1.115.58.0
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If this will not resolve the issue, please open a Ticket with Microsoft CSS.

Authors
Junaid Ahmad Jan , Support Escalation Engineer
Mohit Saxena, Security Team Manager