Redirecting non-www URL to www using .htaccess

Question

I\'m using Helicon\'s ISAPI Rewrite 3, which basically enables .htaccess in IIS. I need to redirect a non-www URL to the www version, i.e. example.com should redirect to ww

Answer 1

Zigdon has the right idea except his regex isn't quite right. Use

^example\.com$

instead of his suggestion of:

^example\.com(.*)

Otherwise you won't just be matching example.com, you'll be matching things like example.comcast.net, example.com.au, etc.