UDP Port Query \ Testing

Got some testing I want to do between two sites, connected over a VPN.

I have very specific UDP ports that I need to ensure are open end-to-end, as I am missing packets from one side to the other.  

So I am looking for something I can install on one side, set my listening UDP ports, then initiate a connection.  It would be awesome if I could specify packet size and even better if i can throw in a DNF bit on those packets as well.
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Daniel HelgenbergerConnect With a Mentor Commented:
I only know of one standard way to test a UDP port, since it is in their nature you cannot test them with only one host. Use netcat:
nc -u <host> <port>

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But of course you need to listen on the other site on that port, you can use netcat as well. Just type something on the sending host.
JamesonJendreasAuthor Commented:
FYI - currently using PortQry and nmap/zenmap.    Thinking nmap/zenmap is the way to go here.
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