Hello,
A port number identifies a process running in your machine, then is implicit
that a process must be running and listening on that port. When your netcat
try to connect it will probably receives an ICMP packet advertising the
"Connection Refused" or an TCP segment with the flags RST set
On 11/10/12 09:53, houkensjtu wrote:
> It seems that, not only on the router, but also I should open a specific port
> on my laptop, otherwise netcat will not be able to connect from outside my
> home.
>
> I wonder why this happens and what is the mechanism behind it.
> Is it possible to open a
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