Replying to Avatar Brunswick

Here is what gpt4 says:

"In TCP/IP networking, a connection is uniquely identified by a tuple consisting of the source IP address, source port, destination IP address, and destination port. While the port number is a 16-bit number, limiting the number of ports to 65,536 per IP address, the distinction between connections is made based on the combination of these four elements, not just the port number."
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Brunswick 1y ago

It sounds like this is a posix-sockets layer capability. On the other hand, each open socket requires a open file handle, so it can be constrained in limits.conf

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