With IPHost Network Monitor you can run simple snmp requests against a Netscreen device in your network.
nsIdsAttkMonPortScan
NETSCREEN Ids Attk Monitor Port Scan
1.3.6.1.4.1.3224.3.2.1.12
port scan attempt attack packet counter.
Back to NETSCREEN-IDS-MIB MIB page.
IPHost Network monitor allows you to monitor nsIdsAttkMonPortScan on Netscreen device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Netscreen VPN routers right now.