UDP Testing

[Dtere]

Anyone around these forums know of a UDP testing tool, that will do the following:

1. Test packets lost (hard to do with UDP because of the way it works.)
2. Test where it is having problems (which hop?)

Trying to figure out if this is a local router problem, computer network controller problem, isp problem, or internet (outer-isp) problem.

Thanks guys.

 

[enouwee]

traceroute should do the job (at least a Linux one). From the version 1.4a12 man page:

-F   Set the "don't fragment" bit.
-m   Set the max time-to-live (max number of hops) used in outgoing probe packets.
-p   Set  the base UDP port number used in probes (default is 33434).

Keep in mind that you may never get an answer, if the destination thinks the data you send is garbage and quietly discards it.


Alternative: use a client and a server instance of netcat. The Windows version hopefully provides the same options as the Unix one. Run one in server mode "-u -l -p <port>" and the second one as client: "-u <server IP> <port>":

-l        listen mode, for inbound connects
-u        UDP mode
-p port   local port number

Once it connected, the server end should see the text typed by the client end.