With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cndeCollectorTable
cnde Collector Table
1.3.6.1.4.1.9.9.226.1.1.2
A control table to configure the NDE collectors. The maximum number of entries is limited by cndeMaxCollectors. The agent sends the NDE packets to each address configured in this table.
Back to CISCO-NDE-MIB MIB page.
IPHost Network monitor allows you to monitor cndeCollectorTable 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.