Getting Apache to redirect all urls to a different host

Question

I would like to redirect all urls from the host a.myhost.com to b.myhost.com. I've explored all the options - Apache redirect, rewriterule directives. I want the redirects to happen to the same target url - which is http://b.myhost.com - regardless of what the original url was (e.g. a.myhost.com/a.html). All the examples that claim to be able to do this, actually don't, in practice (atleast on my Apache installation). The a.html is carried forward to the redirected host - which is not what is desired.

Any ideas?

Answer 1

NameVirtualHost *:80
<VirtualHost *:80>
  ServerName a.example.com
  RedirectMatch .*$ http://b.example.com/
</VirtualHost>

See http://httpd.apache.org/docs/current/mod/mod_alias.html#redirectmatch for details.

Answer 2

RewriteEngine On
RewriteRule ^(.*)$ http://b.myhost.com/ [R,L]

Does that work?

Answer 3

I belive something like this would do the job

RewriteEngine on
RewriteCond %{HTTP_HOST} ^a.example.com
rewriterule ^(.*)$ http://b.example.com$1 [R=301]