I am trying to work out how to redirect an existing website to a new intermediate page which then links back to the customers existing website. I can change DNS records to point to the new hosting server but problem is how to redirect from there back to their existing website.Their existing website only works when it is called using the domain name, do an nslookup on the domain name and try and use the ip number to access it fails with 'You don't have permission to access / on this server.' I guess it is probably hosted on some sort of VPS which operates using the URL in the header.Any suggestions how I can do this redirection. 
How to redirect a website to a holding page with a link back to the original website
redirects