How do you expect the heartbeat process to act?

It wasn't clear from the OPs description, so I asked.

Sure, if you assume the server and client are the same machine.

I made no such assumption.

As I understand, there are 8 one-way connections:

Can you not see, from your own posting, that there are four pairs of ports, and each pair has to communicate in both directions?

. The OP didn't state such a requirement, so why should I assume one?

It is implied by the OPs description. Why would you assume the opposite?

I didn't assume; I asked.

I'm not assuming the OP manages to create UDP packets that are so big, it takes more than 10 seconds to read one packet.

The OP isn't creating them. The pre-existing server might be,

And I didn't assume it; I asked.

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

The start of some sanity?

In reply to Re^6: UDP connection by BrowserUk
in thread UDP connection by falstad

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