Almost certainly Yes. Unless you're trying to do something hack-ish, unsupportable, or completely weird.
For example, Ikea Table "Racks" would be off-topic. But assembly of 0U PDUs would be on-topic...
You've answered the question yourself:
serverfault community is just for professionals
That is it. If you don't ask questions useful to a professional systems administrator, this is not the place for your question.
The kind of questions you've asked so far are mostly the kind that a professional sysadmin is expected to be able to handle. You've asked ...
As an exercise to the reader, have a look at the questions asked by some of the most prolific question askers on the site (all of who are > 40k users mind you):
Kyle Brandt (A Stack Exchange employee and systems administrator)
ewwhite (One of the highest repped users on the site)
Mark Henderson (me!)
Have a look at how these questions differ from your own. ...
Yes, for the majority of users on SF, this distinction is important for several reasons. Browse through meta.sf to get the picture, this is a regular topic here.
It boils down to "We are not the helpdesk for the internet". Our target audience are professional system administrators exclusively and we have certain expectation of users participating here that ...
Ever since the SO/SU/SF triumvirate came about, people have been missing what SF is about. The other two are for anyone dealing with the topical area, SF changed it up in aiming for professionals. We've expended a lot of meta posts over the years about just what professional means in the context of our topic, but the state of the consensus right now is ...
What is server fault for?
IT Professionals asking practical and answerable questions about production systems that they manage in a professional capacity.
I am a student and I need help?No thanks, serverfault community is just for professionals
It sounds like you've answered your own question.
Please note that you're only banned from asking new questions, you are still allowed to post answers, and highly encouraged to do so. Please pay it forward.
Please see What can I do when getting “We are no longer accepting questions/answers from this account”?
Typically limits take deleted questions into account as well.
By design the user interface ...
1- I could post asking for what server would be good in order to solve my problem
As you seem to understand, questions asking "what should I buy to fit these requirements" are off-topic on most/all SE sites.
2- I could post asking about configuration problems, why my newly installed server gives me boot errors.
--->question gets downvoted and ...
All your non-deleted questions have a non-negative score. But deleted questions count towards the question ban too, even doubly if they are deleted and have a negative score. For more details, see the FAQ What can I do when getting "We are no longer accepting questions/answers from this account"?, which also states
If you're blocked from asking ...
To add to the good's @Glorfindel's answer that explain the block. I wanted to paste which question you could improve.
Those deleted questions are the one that hit your ability to post's new's one;
They are at -2 each;
Why can't my android and ios device can't reach my desktop http serverr? [closed]
How to set up samba with an existing OpenLDAP database? [...
I think you already asked the question!
OS X Server is topical enough here, but it isn't considered as much of a serious server operating system as it was back in the days when Apple manufactured actual servers. So you might have to wait a while (or a very long while) before someone answers.
I have no idea what sort of reception this question would get on ...