Are you sure that Apache is not just listening on the loopback interface?

You will probably want it to listen on all interfaces by default, not loopback only.

Your Listen line in httpd.conf should look like

Code:
Listen 80
Not

Code:
Listen 127.0.0.1:80
As the latter will make it listen only on loopback, hence be inaccessible from anywhere else.

Slarty