With IPHost Network Monitor you can run simple snmp requests against a Fortinet device in your network.
fnFirewallAddrZone
fn Firewall Address Zone
1.3.6.1.4.1.12356.2.2.1.1.4
Zone or interface that the address belongs to
Back to FORTINET-MIB MIB page.
IPHost Network monitor allows you to monitor fnFirewallAddrZone on Fortinet device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Fortinet firewalls right now.