I use a Jiffybox from DomainFactory. I used the smallest possible system
size (15,- €/month) without problems with 4 concurrent users working
with it but I am sure it will work for more users.
The jiffybox is a virtual system. This has some useful advantages. It
scales like a charm. :-) It has no fixed contract (you can stop using it
every time and do not pay any more) and you can scale it from one
machine size package to a bigger just by stopping and restarting the system.
You are able to use two boxes (for database and application server) and
have a fast internal network between them if you want this (I never
tried this in a production environment, just did some small tests).
When you are really in trouble (and spend the money) DomainFactory is
able to migrate your system to a dedicated server (afair up to 16 cores)
without problems. You keep your OS image all the time.
I never heard of a "portal" to contrain access but I once set up a
system with an apache server before idempiere to have ssl connections
and this server only allowed connections with a private key. I had to
install this key in every browser I used. (This system does no more run
at this moment.) I would like to create a wikipage together to do a
documentation of this if you want to do it again.
I am sure there are other providers with similar offers. I use
DomainFactory and I am very satisfied.
I would *never* use a system from an us company (like amazon) because
you never know what happens to your data. I strongly advice you to a
system that operates under the laws of the european union. I am sure in
these (nsa) times your users will demand that.
Thomas
mit freundlichen Grüßen,
Thomas Bayen
--
Jakob Bayen KG, Bleichpfad 20-22, 47799 Krefeld
AG Krefeld HRA 416 Tel
+49/2151/65 80 9-0