Saturday, March 29, 2008

Diagnosing Problems With Custom Domains - Case Study #2

The DNS setup shown in my first custom domain case study, "martinezumc.org", isn't typical for all custom domains. That domain, as I showed in my previous post in this series, Diagnosing Problems With Custom Domains - Case Study #1, was symmetrical - both "martinezumc.org" and "www.martinezumc.org" were defined with "CNAME" referrals, and I could have published the blog to either of the two URLs.

When you setup a custom domain while using the "Buy A Domain For Your Blog" wizard, this isn't going to be the case. In this case, the "www" alias will be defined with a "CNAME", but the primary domain won't be.

Let's take a look at "nitecruzr.net".

There are 4 URLs to study here.
  1. The primary domain "nitecruzr.net".
  2. The "www" alias for the domain "www.nitecruzr.net".
  3. The primary BlogSpot URL "nitecruzr-dot-net.blogspot.com".
  4. The "www" alias for the BlogSpot URL "www.nitecruzr-dot-net.blogspot.com".


First, let's dig the DNS records for the primary domain "nitecruzr.net".
;; QUESTION SECTION:
;nitecruzr.net. IN A

;; ANSWER SECTION:
nitecruzr.net. 3600 IN A 64.233.179.121
nitecruzr.net. 3600 IN A 66.249.81.121
nitecruzr.net. 3600 IN A 72.14.207.121


Next, the "www" alias "www.nitecruzr.net".
;; QUESTION SECTION:
;www.nitecruzr.net. IN A

;; ANSWER SECTION:
www.nitecruzr.net. 3600 IN CNAME ghs.google.com.
ghs.google.com. 586847 IN CNAME ghs.l.google.com.
ghs.l.google.com. 203 IN A 72.14.207.121


This is different from my previous case study.
nitecruzr.net.  3600 IN A 64.233.179.121
nitecruzr.net. 3600 IN A 66.249.81.121
nitecruzr.net. 3600 IN A 72.14.207.121
www.nitecruzr.net. 3600 IN CNAME ghs.google.com.


Here, only the "www" alias is using a "CNAME", and the wizard automatically publishes the blog to that. In my case, to "www.nitecruzr.net".

Now, let's look at browser connect logs. First, this is what we get for the "www" alias in the domain "nitecruzr.net".
3/29/2008 08:50:42  Trying http://www.nitecruzr.net
Header:
HTTP/1.0 200 OK
Content-Type: text/html; charset=UTF-8


Next, the primary domain "nitecruzr.net".
3/29/2008 08:50:17  Trying http://nitecruzr.net
Redirect!
Header:
HTTP/1.0 302 Moved Temporarily
Location: http://www.nitecruzr.net
Content-Type: text/html; charset=UTF-8


As in the previous study, we see
HTTP/1.0 302 Moved Temporarily
Location: http://www.nitecruzr.net


This appears to be automatic, and it makes sense. When you setup a brand new domain, you'll likely want the primary domain = the "www" alias. The "302 Moved Temporarily" is a bit dodgy though.

Now, let's look at the BlogSpot URLs.
3/29/2008 08:56:48  Trying http://nitecruzr-dot-net.blogspot.com
Redirect!
Header:
HTTP/1.0 301 Moved Permanently
Location: http://www.nitecruzr.net/
Content-Type: text/html; charset=UTF-8


and
3/29/2008 08:56:38  Trying http://www.nitecruzr-dot-net.blogspot.com
Redirect!
Header:
HTTP/1.0 301 Moved Permanently
Location: http://www.nitecruzr.net/
Content-Type: text/html; charset=UTF-8


Both "nitecruzr-dot-net.blogspot.com" and "www.nitecruzr-dot-net.blogspot.com" redirect to "www.nitecruzr.net", again as in the previous study. This is a asymmetrical, but complete setup - that is, you can see your blog from any of the 4 aliases enumerated above. In earlier setups using the "Buy a Domain ..." wizard, the above results weren't consistently seen.

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1 comment:

Octamom said...

Hey There!

Very much appreciating your site--great info, well organized. I found you through through Google groups and think you might have the expertise to help me out.

I purchased a custom domain through blogspot and have been pleased; however, my readers who are trying to subscribe through Google Reader are not getting my feeds--every other reader seems to work (Mozilla, Yahoo, etc)--Google is the only one not working. I'm burning through Feedburner--just can't seem to figure this out--

Blog is www.octamom.com (custom domain)
original url is www.carrhop.blogspot.com

On my setting, I left the 'carrhop' code from Feedburner as the address under the premise and promise that in purchasing the custom domain, things would be redirected. That has been true in every case except Google Reader.


If you've already covered a case study specific to Google Reader issues, I apologize. I just didn't see anything on a feed being recognized by other readers but not Google--
Thanks so much.
email is octamom@octamom.com
Blessings!