With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
slbStatsDestroyedHCConnections
slb Stats Destroyed HC Connections
1.3.6.1.4.1.9.9.161.1.1.1.1.11
The number of TCP and UDP connections destroyed by SLB, either by TCPIP teardown or timeout. UDP connections can only be timed out. This is the 64-bit version of slbStatsDestroyedConnections.
Back to CISCO-SLB-MIB MIB page.
IPHost Network monitor allows you to monitor slbStatsDestroyedHCConnections on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.