You can also try to use hping in an external script.
But as Henrik wrote, you can't be sure you'll have an answer if a service/daemon is listening to that UDP port.
You can find some infos about hping (with UDP examples) at this URL : http://www.antionline.com/showthread.php?s=&threadid=258387
Nicolas Figaro
-----Message d'origine-----
De : Jeff Stuart [mailto:user-968ca3722b80@xymon.invalid] Envoyé : jeudi 24 novembre 2005 06:09
À : Hobbit Monitoring Program Mailing List
Objet : [hobbit] UDP Port Testing
Does anyone know of a plugin (or a way) to test a UDP port? Yes, I know that may sound strange (IE UDP IS stateless) but I need to be able to basically test if a port responds or not.
Or failing that. I seem to remember a long time ago a plugin for BB that used the qstat game server query program to test game servers. Does that ring a bell to anyone?
--
Jeff Stuart
Network Admin MyInternetServices.com
1-800-300-HOST
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Date: 11/20/2005