DNS zone and subdomain with Joomla, Drupal, Wordpress

[emanation]

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:

A 	demo 			191.192.193.194 	0 	
A  	mail 			191.192.193.194 	0 	
A  	joomlaproduct.com. 	191.192.193.194		0 	
A  	ns1 			191.192.193.194 	0 	
A  	ns2 			191.192.193.194 	0 	
A  	www 			191.192.193.194 	0 	
CNAME 	ftp.joomlaproduct.com. 	joomlaproduct.com. 	0 	
MX  	joomlaproduct.com. 	mail.joomlaproduct.com. 10 	
NS  	joomlaproduct.com. 	ns1.joomlaproduct.com. 	0 	
NS  	joomlaproduct.com. 	ns2.joomlaproduct.com. 	0 	
TXT	joomlaproduct.com. 	v=spf1 +a +mx -all 	0

but what should be at Subdomain DNS zone? I guessed the same, but after reading forum I'm confused with next settings as idea

A 	demo.joomlaproduct.com. 	191.192.193.194 		0 	
A 	ns1				191.192.193.194 		0 	
A 	ns2				191.192.193.194 		0 	
CNAME 	ftp.demo.joomlaproduct.com. 	demo.joomlaproduct.com. 	0 	
MX 	demo.joomlaproduct.com. 	mail.demo.joomlaproduct.com. 	10 	
NS 	demo.joomlaproduct.com. 	ns.demo.joomlaproduct.com. 	0 	
NS 	ns1				ns1.demo.joomlaproduct.com. 	0 	
NS 	ns2				ns2.demo.joomlaproduct.com. 	0 	
TXT 	demo.joomlaproduct.com. 	v=spf1 +a +mx -all		0

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.

[falko]

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.

[emanation]

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

*:80                   is a NameVirtualHost
         default server demo.joomlaproduct.com (/etc/httpd/conf/sites-enabled/demo.joomlaproduct.com.vhost:7)
         port 80 namevhost demo.joomlaproduct.com (/etc/httpd/conf/sites-enabled/demo.joomlaproduct.com.vhost:7)
         port 80 namevhost demo.wordpressproduct.com (/etc/httpd/conf/sites-enabled/demo.wordpressproduct.com.vhost:7)
         port 80 namevhost joomlaproduct.com (/etc/httpd/conf/sites-enabled/joomlaproduct.com.vhost:7)
         port 80 namevhost wordpressproduct.com (/etc/httpd/conf/sites-enabled/wordpressproduct.com.vhost:7)

Where an I change default server?
Thanks.

[emanation]

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.

A 	demo 			191.192.193.194 	0 	
A 	mail 			191.192.193.194 	0 	
A 	joomlaproduct.com. 	191.192.193.194 	0 	
A 	ns1 			191.192.193.194 	0 	
A 	ns2 			191.192.193.194 	0 	
A 	support 		44.55.66.77 	0 	
A 	www 			191.192.193.194 	0 	
CNAME 	ftp.joomlaproduct.com. 	joomlaproduct.com. 	0 	
MX 	joomlaproduct.com. 	mail.joomlaproduct.com. 	10 	
NS 	demo 			ns1.joomlaproduct.com 	0 	
NS 	demo 			ns2.joomlaproduct.com 	0 	
NS 	demo.joomlaproduct.com. ns2.joomlaproduct.com. 	0 	
NS 	demo.joomlaproduct.com. ns1.joomlaproduct.com. 	0 	
NS 	joomlaproduct.com. 	ns1.joomlaproduct.com. 	0 	
NS 	joomlaproduct.com. 	ns2.joomlaproduct.com. 	0

what is wrong?

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

[falko]

You just need these two NS records:

NS 	joomlaproduct.com. 	ns1.joomlaproduct.com. 	0 	
NS 	joomlaproduct.com. 	ns2.joomlaproduct.com. 	0

Please delete the other ones.

[emanation]

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.

[falko]

Originally Posted by emanation

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?