With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cnatConfEntry
cnat Config Entry
1.3.6.1.4.1.9.10.77.1.1.1.1
Each entry in the cnatConfTable holds a set of configuration parameters associated with an instance of NAT. Entries in the cnatConfTable are created and deleted using the cnatConfStatus object.
Back to CISCO-IETF-NAT-MIB MIB page.
IPHost Network monitor allows you to monitor cnatConfEntry on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.
