DNS zone and subdomain with Joomla, Drupal, Wordpress
 

Hello.
I've read Manual and overview related topics at forum and I can't understans one minor thing which make major problem.

Lets say that I have Joomla installed at Website and another Joomla at subdomain: www.joomlaproduct,com and demo.joomladroduct.com. Both are created as website. Below I mean in subdomain the address which looks like subdomain just.

At domain registrant I have personal name server records like ns1.joomladroduct.com and ns2.joomladroduct.com

It's obivious that DNS zone for mail website should be:
but what should be at Subdomain DNS zone? I guessed the same, but after reading forum I'm confused with next settings as idea

but in fact I don't need MX, TXT records for subdomain, but CNAME ftp must be because there separate FTP user. Though it's not necessary because connection could be established by IP

Of cause I mean in subdomain separate website which just looks like subdomain.

Please, help me to find the truth.
Thanks.

You cannot create a zone for a subdomain. You have to create all records in the zone for the main domain, and as far as I can see, that zone looks fine.

Redirect loop
 

Hello.
Thanks for conclusion.
You are right, now everything works good except Redirect Loop for demo.joomlaproduct.com
Though as you know Joomla has administrator subfolder for Back-End. I can open it by demo.joomlaproduct.com/administrator
But demo.joomlaproduct.com brings Redirect Loop. And .htaccess rules don't affect to it. Checked by removing .htaccess for testing result.

Also From Manual I see that domain.vhost files could solve. But I don't imagine how exact
Could you give a hint about that.

Perhaps is happen because httpd- S gives me
Where an I change default server?
Thanks.

in fact I was wrong. demo.joomlaproduct.com is not opening from other PCs because address is not found.
Now I have this and it doesn't solve my problem.
what is wrong?

BTW record "A support 44.55.66.77 0" works perfect. That request should be redirected to other server.

You just need these two NS records:

Please delete the other ones.

hello.
Yes, I've got it. I had problem before because named (BIND) service. For some reason it was stopped.
Redirect also solved because it was Joomla issue.
Now I have problem that after several hours IPSConfig panel could not be opened. If I reboot server it works again. I can't understand what is depence of that issue. But it happens regularly.

Do you use something like fail2ban that could lock you out? Or maybe it's a problem with your RAM?