Ok,
I am new to S&M, no not really have been working with MS for years,
but anyway.
I just got my server and after locking myself out by turning on ICF which
doesn't work real well, I turned on RRAS and it is working.
My question is, I really do not know whether I must set it up for
the range of IP addresses that seems to have been issued to me or just for the primary one.
What iis the range of ips ? Are they active ?
Regards

You should have recieved the range of IPs you were given in one of the Welcome emails.
Yes you need to set it up for the range. Once you set up the interface, open its properties and go to the "Address Pool" tab. Click add then plug in the range starting with the next IP after the primary IP you set when you enabled the service.

We call it SM, not S&M