So here I am again. Sorry for letting you wait. I figured out where the limit is reached. I wrote a small program that opens reusable UDP sockets (not TCP as I was told lately... please excuse this lack of essential information, I'm very sorry) in a 'forever'-loop and tries to send some dummy text over them. After about 28140 open sockets the program quits with the errormessage:

sendto: resource temporarily unavailable

So this is what our software does. But just after only 350 open UDP sockets.

Does anybody know what it means and how we can break this limit?

The machine where this fedora is running on is a Dual XEON 64bit system with 1gig of RAM.

Hope this helps helping me finding a solution... ;) I'm sorry for forgetting some informations!

thanks a lot for any kind of help!

Regards, Hendrik W.