Hi,
I'm an ASP/.Net developer and for password authentication stuff I use ASPProtect, it's simple to install + very effective. The full version is packed full of good features, and so is the free one, you can download the free version from
http://www.aspprotect.com.
Thats only if you're on a Windows hosting package, if you're on a Linux 1 I would highly recommend going for a Javascript password system, not very protective, but still works and simple to install if you're a noobie.
Heres a good link for Javascript systems:
http://javascript.internet.com/passwords/
If you're more experienced and on Linux I would have a look through the hotscripts PHP password authentication directory at
http://www.hotscripts.com/PHP/Script...ion/index.html. If you need any help or more info don't hesitate to post here, we will all help you out, I'm sure.