Forcing www.domain.com instead of domain.com

[tamar]

Hi,

I'm trying to create a canonical URL so that every domain points to www.domain.com rather than domain.com.

I don't see a way of doing this through Plesk, and I have over 250+ domains to manage, so modifying 250+ httpd.include files may be too much.

Is there any way to make this setting server-wide so that I don't have to modify hundreds of files? If so, what is the syntax (if any required) and where is this implemented? I can log onto the shell if necessary.

Thanks!