With IPHost Network Monitor you can run simple snmp requests against a Netscreen device in your network.
nsIfFlowInPacket
NETSCREEN If Flow In Packet
1.3.6.1.4.1.3224.9.3.1.4
Incoming packet number arriving at the this interface
Back to NETSCREEN-INTERFACE-MIB MIB page.
IPHost Network monitor allows you to monitor nsIfFlowInPacket on Netscreen device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Netscreen firewalls right now.