ip to name how to do?

We have a CWP and all working fine. Now the base IP is http://1.2.3.4 (for example) and we want this IP not to serve any pages as we cannot set any SSL on IP. So is it possible to have the .htaccess in /usr/local/apache/htdocs have some redirect option? If we put a htaccess in there the redirection does not work at all. We added the correct user to the .htaccess and put this inside there:
(ip is fictive)
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} ^12\.34\.56\.789$
RewriteRule ^(.*)$ http://www.domainname.com/$1 [L,R=301]

Redirect is configured just fine but not running. Hope you guys can maybe have some help?

I also get this in the logs:
 client denied by server configuration: /usr/local/apache/htdocs/.htaccess
Nothing is changed on apache side it is default.

this also depends on the running webserver, htaccess is for apache only. so if you have apache and nginx, the htaccess is the wrong place doing this.

If you have apache only this should do the trick:

RewriteEngine On
RewriteCond %{HTTP_HOST} ^11\.11\.11\.111$ [NC,OR]
RewriteCond %{HTTP_HOST} ^([a-z.]+)?mydomain\.com$ [NC]

You can simply add to .htaccess
Redirect 301 / http://www.domainname.com/