choosing distributed comm ports
Sat Dec 11 14:33:44 CET 2004
On Fri, Dec 10, 2004 at 01:35:34PM -0800, Michael McDaniel wrote:
> I have noticed that the ports used when my nodes communicate are not always
> the same (not a surprise). I would like to have known fixed ports so that
> I can open those specific ports on the various firewalls where my Erlang
> nodes will be installed.
There are three interesting environment variable read by the code
in inet_tcp_dist.erl which are used to control the establishment
of the listen socket for distributed erlang.
are used to set a range of the incoming portnumbers for
distribution, use this to force one (or a range) of
explicit port numbers. These portnumbers can then be
fed into firewalls
Is another security related env parameter. It's used
to bind() the distribution to an explicit interface
on the box. Also useful for security reasons.
Claes Wikstrom -- Caps lock is nowhere and
http://www.hyber.org -- everything is under control
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