With IPHost Network Monitor you can run simple snmp requests against a Netscreen device in your network.
nsNatVipCfgIp
NETSCREEN Nat Vip Configure Ip
1.3.6.1.4.1.3224.11.3.1.1.2
The IP address for the VIP, which must be in the same subnet as the untrusted interface and can even be the same address as the untrusted interface.
Back to NETSCREEN-NAT-MIB MIB page.
IPHost Network monitor allows you to monitor nsNatVipCfgIp 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.