NETBIOS NS: Invalid Header Count
This protocol anomaly is a 1) a query message with ARCOUNT (answer count) or NSCOUNT (number of records in the authority section of a name service packet) fields of the header that are not zero, or 2) a response message with a QDCOUNT (number of entries in the question section) that is not zero.
References
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3