With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cipUdpListenersTable
Cisco Channel Interface Processor Udp Listeners Table
1.3.6.1.4.1.9.9.32.1.4.2
This table contains a list of parameters pertaining to the listeners for a particular UDP stack.
Back to CISCO-CIPTCPIP-MIB MIB page.
IPHost Network monitor allows you to monitor cipUdpListenersTable 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.