With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cfwNetEventDstIpPort
Cisco Firewall Net Event Dst Ip Port
1.3.6.1.4.1.9.9.147.1.1.2.2.1.9
Destination UDP/TCP port in the IP packet that caused the event. If there is no packet associated with the event this object has the value of zero. If the event is the result of multiple packets with different destination ports, this value may be zero or a port taken from an arbitrarily chosen packet in the sequence of packets causing the event.
Back to CISCO-FIREWALL-MIB MIB page.
IPHost Network monitor allows you to monitor cfwNetEventDstIpPort 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.
