With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
natSessionMaxIdleTime
nat Session Max Idle Time
1.3.6.1.2.1.123.1.9.1.20
The max time for which this session can be idle without detecting a packet.
Back to NAT-MIB MIB page.
IPHost Network monitor allows you to monitor natSessionMaxIdleTime on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.
