With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cfwNetEventsEntry
Cisco Firewall Net Events Entry
1.3.6.1.4.1.9.9.147.1.1.2.2.1
An entry in the table, containing detailed information about an event. Note that this table may be sparse. If Network Address Translation is not enabled cfwNetEventInsideSrcIpAddress and cfwNetEventInsideDstIpAddress will not be instantiated in the row. If Port Address Translation is not enabled cfwNetEventInsideSrcIpPort and cfwNetEventInsideDstIpPort will not be instantiated in the row. Entries are added to this table at the same time that events are added to the cfwBasicEventsTable. These two tables may be configured to be different sizes so there may not be a one-to-one correspondence between rows in the two tables.
Back to CISCO-FIREWALL-MIB MIB page.
IPHost Network monitor allows you to monitor cfwNetEventsEntry 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.