With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cgkHistoryEventType
Cisco Gatekeeper History Event Type
1.3.6.1.4.1.9.10.40.1.2.2.1.2
The object indicates the event that occurred. other - An event other than the ones listed below. register - A full RRQ was received by the gatekeeper to register a previously unregistered endpoint. unregister - An endpoint was unregistered because it sent a URQ to the gatekeeper. unregisterForced - The gatekeeper sent a URQ to the endpoint. overload - The gatekeeper has detected sustained overload. A sustained overload condition will cause the gatekeeper to reject calls.
Back to CISCO-GATEKEEPER-MIB MIB page.
IPHost Network monitor allows you to monitor cgkHistoryEventType 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.