With IPHost Network Monitor you can run simple snmp requests against a Netscreen device in your network.
nsVpnMonVpnName
NETSCREEN Vpn Mon Vpn Name
A textual string containing information about the VPN entity from which this tunnel was derived.
Back to NETSCREEN-VPN-MON-MIB MIB page.
IPHost Network monitor allows you to monitor nsVpnMonVpnName 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.