Event ID - 84

Event Id84
SourceWLBS
DescriptionNLB Cluster %2 %1: NLB was unable to open the NLB public connection callback object and will therefore be unable to track connections. %3 %4
Event InformationAccording to Microsoft:
Cause:

Network Load Balancing (NLB) tracks TCP connections to ensure affinity to the host servicing the connection. In a Microsoft Internet Security and Acceleration Server (ISA Server)/NLB deployment, if NLB cannot open a communication channel with the firewall engine, it cannot guarantee, under certain conditions, that a given TCP connection is serviced by the same host for its duration.
User Action :
This communication medium with the firewall engine is required for Microsoft Internet Security and Acceleration Server (ISA Server)/NLB deployments. Check the ISA Server installation to verify that it is correctly configured, and then try restarting the host.
Reference LinksNLB was unable to open the NLB public connection callback object and will therefore be unable to track connections

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