NLB cluster %2]: The NLB driver failed to open the SYN attack callback object. A SYN attack is a type of denial of service ...

NLB cluster [%2]: The NLB driver failed to open the SYN attack callback object. A SYN attack is a type of denial of service attack which happens when a malicious user sends many open many TCP connections to the server exhausting system resources. Although NLB will still accept new connections, it may not perform optimally in the event of a SYN attack.