Creating a remote website mirror for development.

Problem: Client needs access to up-to-date website files to make updates, but I don't want him to edit the live site.

Solution: Create dev.mysite.com and an ftpuser for that domain. Use that ftpuser to place a mirror of the website within that subdomain. Since my links are relative, browsing works fine. Absolute links, of course, will remove you from the dev subdomain. Either way, replacing "www" with "dev" in the url gets you to the counterpart in the dev website.