With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cpcIpFilterMask
cpc Ip Filter Mask
1.3.6.1.4.1.9.9.602.1.2.3.1.4
The prefix length value associated with the corresponding cpcIpFilterAddress. The value of zero indicates that no IP mask is associated with the corresponding cpcIpFilterAddress. This object may be modified while value of the corresponding instance of cpcIpFilterRowStatus is 'active'.
Back to CISCO-PACKET-CAPTURE-MIB MIB page.
IPHost Network monitor allows you to monitor cpcIpFilterMask 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.