Forward all Subdomains to another domain (with subdomain intact)

Question

I have moved a lot of people off one of my servers. Each person had an account using subdomains so urn.example.com urn2.example.com. What I would like to do is set it up so ANY subdomain accessed on the example.com domain is automatically forwarded to the correct subdomain on example.co.uk domain.

So urn.example.com would go to urn.example.co.uk.

I'm not that up on DNS so I don't really know what I am looking for.

I have set up an A Record for *.example.com pointing to the IP address of example.co.uk thinking that "may" work but it hasn't.

EDIT: I have now set up a *.example.com CNAME record pointing to example.co.uk. I am waiting to see if it works.

Answer 1

If I understand correctly, you want to:

*.domain.com > *.domain.co.uk

And have the * host specification match up correctly.

If yes, then I suggest creating *.domain.com and then using Rewrite Rules to do a permanment redirect to the co.uk domain.

Options +FollowSymLinks
RewriteEngine on
RewriteCond %{HTTP_HOST} ([a-z0-9-]+).domain.com [NC]
RewriteRule ^(.*)$ http://%1.domain.co.uk/$1 [R=301]

This is just a stab at the rewrite rule - it has not been tested. The idea is to catch the sub domain name in back reference and then pass it into your new URL.

Answer 2

I don't believe that what you want to do can be done using DNS alone. I'd setup a virtual host for *.example.com which does a 301 (permanant) redirect to the correct example.co.uk url.