Hi Valentin,

*(I repeat the same question I put to B.R. as you raised the same
point.)*

So you are referring to the 4-tuple (source_IP, source_port,
server_IP, server_port) socket limitation, correct? I just came to
know about this and it's interesting. Please tell me if this
understanding of mine is correct:

So a server identifies a user's connection based on a combination
of: user's internet connection's IP + port the user's client is
connecting from (e.g. Chrome on 8118, IE on 8080, etc.) +
server IP + server_port (80 for HTTP / 443 for HTTPS).

And the limitation is that a maximum of ~ 65536 clients all on
same port (say all are using Chrome and therefore connecting from
8118) can connect simultaneously to a web server that is connected
to the internet via 1 public IP address and port 80 (let's say
HTTP only), IFF the resources of the server permit.

And that means I can double the no. of connections (2x 65536 per
second) my server can handle, if it has enough resources in the
first place (i.e. sufficient RAM, CPU, I/O capacity or whatever
is relevant) by simply adding another public IP address to my
server and making sure that the traffic is load-balanced between
the two public IPs of the server.

Am I correct?

If my understanding is correct, this comment was helpful:
http://stackoverflow.com/q/34079965#comment55913149_34079965

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