[evla-sw-discuss] External network access

[James Robnett]

    Historically machines on the EVLA M&C network
(10.80.100.0) like mchost, eva etc were completely
cut off from the outside world.

    To accomodate a recent request they now get a
temporary public address when communicating
with the outside world.   This NAT'ed (1) addresses
are only created for outbound requests from the
EVLA  network.

     It is still not possible (and never will be) for
external systems to create an inbound request,
they can only reply.

     The only real effect for most folks is that things
like web browsers can now bring up external
web pages.   You still can't 'ssh' to them from
an outside entity, though you could ssh *to*
an outside entity from one of them.

James
1)Network Address Translation