Apache does not accept "WWW" domains (1 reply)

Hello, i have the following problem:

I have configured wamp server, and I have 1 website hosted on it, i have enabled port 80 on my router and firewall and when using the domain [mywebsite.com] from a coputer outside my network, the website shows correctly, but when using [www.mywebsite.com] it says

You don't have permission to access / on this server.

I appreciate the hep you can provide on this matter.

Regards.