Client logs show events resembling the following:
Severity: Major, Event: Active Response, Description: Traffic from IP address is blocked from to
Pop-up on the client machine states 'Traffic blocked for 10 minutes.'
This issue has been addressed in SEP RU6 and onwards.
If you are unable to update to RU6 at this time, the following workaround can be applied:
1. On the SEPM, edit the existing firewall policy
2. Choose Traffic and Stealth Settings
3. Remove the check mark from "Enable Anti-MAC spoofing"
This has been found on Windows XP SP2 and SP3, Windows 2003, Windows Vista, Windows 7 and Windows Server 2008 (& R2).
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