Created question in FIWARE Q/A platform on 26-07-2016 at 15:07
Please, ANSWER this question AT http://stackoverflow.com/questions/38591793/fiware-subnet-settings-in-the-fiware-cloud

Question:
Fiware Subnet settings in the Fiware Cloud?

Description:
I have worked through the tutorials and webvideos,
but some very basic questions about the Fiware cloud remain still open.

a) When adding a Subnet to the Network,
How to choose Network Address and DNS name server?
I mean what is practical? If I make up a Network address, how do I know that it is not taken yet? If I just use 192.168.1.1 does that not connect to any router? Sorry i really don't have a clue there.

b) Why does network subnet does not accept Admin state and holds it
after checking it? Is one supposed to keep the admin state checked?

c) What does "source" mean in the security group rules?
It is always 0.0.0.0/0. Or could one add here the ip address from
an outside device, e.g. an external computer connected to the internet / a potential context provider? So by adding the source here it would be able to communicate with the deployed image?

d) in some/most tutorials the ports are only opened from
port number to port number, e.g. 22 to 22, but in the video they are opened e.g. from 1 to 22. Is that an error in the video?
https://youtu.be/mb7CdMnZh7Q?t=2m3s