With IPHost Network Monitor you can run simple snmp requests against a Fortinet device in your network.
fgVpnObjectGroup
fg Vpn Object Group
1.3.6.1.4.1.12356.101.100.8
Objects pertaining to Virtual Priavet Networking on FortiGate devices.
Back to FORTINET-FORTIGATE-MIB MIB page.
IPHost Network monitor allows you to monitor fgVpnObjectGroup on Fortinet device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Fortinet WAN extenders right now.