Dynamic selection for network service ports?
rosuav at gmail.com
Wed May 1 03:55:26 EDT 2019
On Wed, May 1, 2019 at 5:44 PM Markus Elfring <Markus.Elfring at web.de> wrote:
> > You'll get anything in the ephemeral ports range.
> From which documentation source did you get this information for
> the handling of a zero as an useful setting?
If you don't bind to a port, you get an arbitrary port in the
ephemeral port range. That's just how BSD sockets work. Source: a
couple of decades of programming experience.
> > But the other cause is that you recently shut the server down,
> > and the port is still in the TIME_WAIT state.
> Does this technical detail occasionally increase the need to choose
> an additional number for a quickly restarted service in a dynamic way?
> > You can avoid this with the SO_REUSEADDR flag.
> Can such a configuration parameter be used also together with
> programming interfaces from the module “socketserver”?
How about you do some research with the socket module and see if you
can find answers in the docs. I have faith in you :)
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