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DNS Question

movieprodw
movieprodw asked
on
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Last Modified: 2016-05-23
Hello,

I have the following DNS but it is not pointing correctly.

What I have is one website that checks the url and pulls info from the DB based on the URL.

I have about 50 domains pointed to the same ip but only one website actually on the IP... hope that makes sense.

It was all working great until I changed the default website for that IP to another page that I am testing, it broke all of the other pages. I thought it would be fine since the cname is pointed to the main website, but it did not work.

Can you please let me know how to resolve this.

austinminisearch.com

NS
Subdomain       Name Server               TTL       Actions
      ns1.codero.com.               14400       
      ns2.codero.com.               14400       

MX
There are currently no MX resource records

A
Name       IP Address               TTL       Actions
@       69.64.82.57               14400
mail       69.64.82.57               14400

AAAA
There are currently no AAAA resource records

CNAME
Alias       Hostname               TTL       Actions
      makemodelsearch.com.               14400

There are currently no TXT resource records
There are currently no SRV resource records

Matt
Screen-Shot-2014-08-31-at-3.34.02-PM.png
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Chris DentPowerShell Developer
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Top Expert 2010

Commented:
This is not permissible according to DNS RFCs:
CNAME
Alias       Hostname               TTL       Actions
      makemodelsearch.com.               14400 

Open in new window

I would not expect it to be reliable. It breaks the ANY response DNS clients get back because address records are not returned.

However, I don't think that's the cause of your problem (red flags, sirens, all that kind of thing, but likely to be unrelated).

I would hypothesise that the page you've changed was the one answering on any name? The one you have left only answers when makemodelsearch.com is in the host header?

DNS will not change the name used to access a resource (it is not responsible for URL rewriting). Therefore if a user enters http://austinminisearch.com the web server must be prepared to answer a request for that name, even if your content is drawn from something you refer to as makemodelsearch.com.

Any good?

Chris
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Distinguished Expert 2019

Commented:
As chris pointed out, a CNAME for the domain name itself is a problem,  The impact will be only on mail handling, and since you do not have it setup, it does not really matter. I suspect, that your domain registrar/dns console provide might actually
The other issue is that URL are often prepended with www.domainname.com which in your case does not exist nor is the cname.
Your other issue deals with the conflict of
Host entry
@ IPaddress
CNAME

The two are conflicting.

If you must, replace the CNAME YOU have with the
www www.makemodelsearch.com

It is unclear what changes you made nor what your script was trying to do.

Presumably, your default page was determining what the requested URL is and would process the response accordingly.
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Commented:
Although your DNS setup is not RFC compliant, your problem is in your "home page" code, not your DNS.

For example, this is the response I get when trying to access http://alfaromeosearch.com/

HTTP/1.1 302 Moved Temporarily
Date: Tue, 02 Sep 2014 08:06:07 GMT
Server: Apache
Location: http://69.64.82.57/
X-Powered-By: PleskLin
Content-Length: 0
Connection: close
Content-Type: text/html; charset=UTF-8

Something redirects requests that are not makemodelsearch.com to the raw IP address, where the defasult web site kicks in. It is either a rewrite in Apache httpd.conf or a piece of code in the default page.

You have Plesk which is the main suspect and where I would start my troubleshooting efforts.
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Commented:
Okay, I will test this, thank you

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