IP blocking

Hi,
I am considering this extension, but have a few questions before buying.
I have created an intranet locally installed on one of our servers. I would like to be able to publish it online, but if an user is entering the site outside our network (identified by our IP), the user need to log in; either by username/password or a common password.
Is this a function in Your extension?

Please don't hesitate to ask if you have any questions!

Hi and thank you for your quick reply,
This doesnt suit my needs, as I need to be able to access the site from any IPs, but when the IP is confirmed (whitelisted) the user should be able to access the full site. When the IP is not whitlisted, an login screen should appear to be able to see this site.