With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cfgFilterNetworkGroupTable
Cisco Filter Network Group Table
1.3.6.1.4.1.9.9.474.1.1.2
This table is used for adding/deleting network filter group. A network filter group is used to specify host IP addresses or subnet ranges. This is applicable only for the cfgFilterGroupType value of 'network'.
Back to CISCO-FILTER-GROUP-MIB MIB page.
IPHost Network monitor allows you to monitor cfgFilterNetworkGroupTable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.