With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cieTestConnTable
Cisco IP Encryption Test Connection Table
1.3.6.1.4.1.9.9.52.1.4.1
A table of test crypto session entries.
Back to CISCO-IP-ENCRYPTION-MIB MIB page.
IPHost Network monitor allows you to monitor cieTestConnTable 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.