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
mx-19.3
vmx-19.3
vsrx-19.2
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-19.4
vsrx3bsd-19.4
srx-branch-19.4
vsrx-19.4
vmx-19.4
mx-19.4
srxevo-25.4
vsrx-26.2
srx-26.2
srx-branch-26.2
vsrx3bsd-26.2
mx-12.3
srx-12.3
srx-branch-12.3
vsrx-12.3