With IPHost Network Monitor you can run simple snmp requests against a Fortinet device in your network.
fnSysSnmpSecUserName
fn Sys Snmp Sec User Name
1.3.6.1.4.1.12356.1.5.3.1.1.1
Security user name. This attribute is the index of the table
Back to FORTINET-MIB MIB page.
IPHost Network monitor allows you to monitor fnSysSnmpSecUserName 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.