This is not possible with any Network Monitoring Software. As UDP is a sessionless protocol where blind requests are sent and hope is used to get a response, the only way to test if something is responding on a specific UDP port is to know how to communicate with it.
For example, in order to test if SNMP is available on a system, ipMontior does not "connect" to UDP port 161. It sends an SNMP GET request and waits for a response. If it receives a response, it knows the port is available. If it receives no response, it assumes that a port is closed or SNMP is not listening on that system.
Having all that said, in order to test a UDP port, you would need to write a script that sends a command to that port and expect a response. Once that script is written, simply use the External Process Monitor to run it. Some example scripts that can be used with ipMonitor are found here:
Hope this all makes sense.
Chris Foley | Support Specialist
SolarWinds | IT Management, Inspired By You
Support:866.530.8040 || Fax:512.857.0125
Thanks, it does make sense yes.