With IPHost Network Monitor you can run simple snmp requests against a Fortinet device in your network.
fgVpnSslStatsMaxTunnels
fg Vpn Ssl Stats Max Tunnels
1.3.6.1.4.1.12356.101.12.2.3.1.7
The maximum number of active SSL tunnels at any one time in the virtual domain
Back to FORTINET-FORTIGATE-MIB MIB page.
IPHost Network monitor allows you to monitor fgVpnSslStatsMaxTunnels 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.
