With IPHost Network Monitor you can run simple snmp requests against a Fortinet device in your network.
fgIpSessEntry
fg Ip Sess Entry
1.3.6.1.4.1.12356.101.11.2.1.1
Information on a specific session, including source and destination
Back to FORTINET-FORTIGATE-MIB MIB page.
IPHost Network monitor allows you to monitor fgIpSessEntry 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.