With IPHost Network Monitor you can run simple snmp requests against a Fortinet device in your network.
fgAppIMConnBlocked
fg App IM Connection Blocked
1.3.6.1.4.1.12356.101.10.110.1.1.4
Number of connections blocked in this virtual domain
Back to FORTINET-FORTIGATE-MIB MIB page.
IPHost Network monitor allows you to monitor fgAppIMConnBlocked on Fortinet device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Fortinet switches right now.