SMB2 Server Denial of Service

Hi,

My firewall has detected the "SMB2 Server Denial of Service" on one of our domain controller servers based on windows server 2008R2. Is there any workaround or updates/patches that could help me prevent these attacks?

https://technet.microsoft.com/en-us/library/security/ms11-048.aspx

The above MSU is already installed even then the attack has been reported. Please let me know if there is anything else that i need to do to stop/mitigate these attacks.

Thanks

Farhan Umer