Using Blogger with a custom domain: the zonefile dot problem

A quick note to myself the next time I stumble over this: when you instruct Blogger to map the blog to a 3rd party (custom) domain it basically instructs you to add three entries to your domain’s zone file:

1. a mapping from the domain to ghs.google.com
2. a mapping from some weird subdomain you’ll be given to another wreird subdomain at google. Apparently this is some load balancing measure
3. A TXT verification record

Now, these google domains you’ll be given are qualified (“absolute”) domains and always end with a dot. If your domain is example.com and you remove the dot:

blog                3600 IN CNAME   ghs.google.com

(Note that ghs.google.com does not end with a dot)

Here “blog” will map to blog.ghs.google.com.example.com.

The correct zonefile entry is

blog                3600 IN CNAME   ghs.google.com.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s