With IPHost Network Monitor you can run simple snmp requests against a Fortinet device in your network.
fnNidsSigUserDefName
fn Nids Sig User Def Name
1.3.6.1.4.1.12356.5.1.3.1.1
User defined signature name or abbreviation
Back to FORTINET-MIB MIB page.
IPHost Network monitor allows you to monitor fnNidsSigUserDefName 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.