I'm new to dotnetnuke, aside from some work I did with it a few years ago, but it was very minimal work.

I want to use dotnetnuke only for forums with SSO, I don't need the other parts of the site at this point. I have a subdomain set up for the installation of DDN:
forums.mysite.com

Right now when you access the url the user is presented with the default home page of DNN, I need this to go away and go straight to forums.

Questions:
1) Is this possible?
2) Does DNN support forums right out of the box or do I need to install an addin
3) If addin, which do you recomennd
4) My main site is using ASPNet authorization set up, what do I need in DNN to enable SSO

I'm not asking for complete answers to the questions, but just pointing in the right direction to get started.
Thanks
Wayne

Started to look at YAF.net, but Chrome, IE, and Windows defender reported a virus in the code download. Not sure what that's all about.