Apache Alias between sites

[rhecker]

I have a client who wants a WordPress blog, but for security reasons I do not want Wordpress in the same cPanel account with the client's website. The client wants the url to the blog to be mysite/blog. Since I use a LINUX VPS, I figured I could use an Apache Alias to redirect from the client site to the blog,(using post virtualhost include) like this:
Alias /blog home/blogsite/public_html

I have Aliases that work within the same cPanel account where there are multiple domains, but the above doesn't work between two accounts

I don't want to use a redirect, such as in htaccess, because that would defeat the SEO benefits. We want the blog to APPEAR to be within the client website.

So I'm not sure if I need to do something different with the alias or use a different method. This must be possible. Suggestions?

[Christopher]

You could do blog.mysite.com and have it on a different server. You could also put it in a frame at mysite.com/blog.

[rhecker]

Thanks for your thoughts. As I said, it's THE SAME SERVER, but different cpanel accounts. Not a different server. That's why I was hoping alias would work. blog.mysite.com would just be a redirect, so that's not a solution. The real solution would be if alias could somehow work, or something similar.