Skip to main content

Custom Domain DNS Addresses And Name Addressing Conventions

Periodically, when reviewing the many problem reports about Google Custom Domains, and especially those reporting the ubiquitous "Another blog ..." error message, we'll look at the DNS configuration and see a partial DNS setup
www.mydomain.com. 900 IN CNAME ghs.google.com.

yet the blogger reporting the problem states
I setup my domain with both the root, and the "www" alias, defined. This is what I setup! Whatever can the problem be?

mydomain.com.  3600 IN A 216.239.32.21
mydomain.com.  3600 IN A 216.239.34.21
mydomain.com.  3600 IN A 216.239.36.21
mydomain.com.  3600 IN A 216.239.38.21
www.mydomain.com. 900 IN CNAME ghs.google.com.

We look deeper, and find not the above, but
mydomain.com.mydomain.com.  3600 IN A 216.239.32.21
mydomain.com.mydomain.com.  3600 IN A 216.239.34.21
mydomain.com.mydomain.com.  3600 IN A 216.239.36.21
mydomain.com.mydomain.com.  3600 IN A 216.239.38.21
www.mydomain.com. 900 IN CNAME ghs.google.com.

or maybe
mydomain.com.  3600 IN A 216.239.32.21
mydomain.com.  3600 IN A 216.239.34.21
mydomain.com.  3600 IN A 216.239.36.21
mydomain.com.  3600 IN A 216.239.38.21
www.mydomain.com.mydomain.com. 900 IN CNAME ghs.google.com.

SAY WHAT?

This is a typical problem with many GUI Domain Managers, where "mydomain.com" is already known to the wizard (look at the top of the Domain Manager display). When you specify a "CNAME" for "www.mydomain.com", in the "CNAMES (Aliases)" entry, you don't specify "www.mydomain.com", you simply specify "www". Specifying "www.mydomain.com" for "CNAMES (Aliases)" results in
www.mydomain.com.mydomain.com. 900 IN CNAME ghs.google.com.

Similarly, specifying "mydomain.com" for "A (Host)" results in
mydomain.com.mydomain.com. 900 IN CNAME ghs.google.com.

This will not always be the case, unfortunately. Some DNS Manager wizards automatically extract redundant "mydomain.com" phrases from the "A (Host)" and "CNAMES (Aliases)" entries. Others, like GoDaddy, do not.

For GoDaddy and some (not all) similar wizards
  • To designate "mydomain.com": Enter "@" (that's a Shift-2, on most keyboards), under "A (Host)".
  • To designate "www.mydomain.com": Enter "www", under "CNAMES (Aliases)".

If you have a third party DNS Host (not eNom or GoDaddy), you are responsible for finding out how they signify the domain root, when entering the "A (Host)" and "CNAMES (Aliases)" records. Try and prevent
mydomain.com.mydomain.com.  3600 IN A 216.239.32.21
mydomain.com.mydomain.com.  3600 IN A 216.239.34.21
mydomain.com.mydomain.com.  3600 IN A 216.239.36.21
mydomain.com.mydomain.com.  3600 IN A 216.239.38.21
www.mydomain.com. 900 IN CNAME ghs.google.com.

or
mydomain.com.  3600 IN A 216.239.32.21
mydomain.com.  3600 IN A 216.239.34.21
mydomain.com.  3600 IN A 216.239.36.21
mydomain.com.  3600 IN A 216.239.38.21
www.mydomain.com.mydomain.com. 900 IN CNAME ghs.google.com.

and eliminate one possible cause for the "Another blog ..." error.

Comments

Popular posts from this blog

Stats Components Are Significant, In Their Own Context

One popular Stats related accessory, which displays pageview information to the public, is the "Popular Posts" gadget.

Popular Posts identifies from 1 to 10 of the most popular posts in the blog, by comparing Stats pageview counts. Optional parts of the display of each post are a snippet of text, and an ever popular thumbnail photo.

Like many Stats features, blog owners have found imaginative uses for "Popular Posts" - and overlook the limitations of the gadget. Both the dynamic nature of Stats, and the timing of the various pageview count recalculations, create confusion, when Popular Posts is examined.

Leave Comments Here

Like any blogger, I appreciate polite comments, when they are relevant to the blog, and posted to the relevant article in the right blog. If you want to ask me a question thats relevant to blogging, but you can't find the right post to start with (I haven't written about everything blogger related, yet, nor the way things are going I don't expect to either), ask your questions here, or leave an entry in my guestbook.

As noted above, please note my commenting policy. If you post a comment to this post, I will probably treat it as a "Contact Me" post. If you have an issue that's relevant to any technical issue in the blog, please leave a comment on the specific post, not here. This post is for general comments, and for non posted contact to me.

If the form below does not work for you, check your third party cookies setting!

For actual technical issues, note that peer support in Blogger Help Forum: Something Is Broken, or Nitecruzr Dot Net - Blogging is, almos…

What's The URL Of My Blog?

We see the plea for help, periodicallyI need the URL of my blog, so I can give it to my friends. Help!Who's buried in Grant's Tomb, after all?No Chuck, be polite.OK, OK. The title of this blog is "The Real Blogger Status", and the title of this post is "What's The URL Of My Blog?".