With IPHost Network Monitor you can run simple snmp requests against a Netscreen device in your network.
nsNatVipCfgStatus
NETSCREEN Nat Vip Configure Status
1.3.6.1.4.1.3224.11.3.1.1.5
The status of the server on the trusted/DMZ interface.
Back to NETSCREEN-NAT-MIB MIB page.
IPHost Network monitor allows you to monitor nsNatVipCfgStatus 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.