I have two questions on wss 3.0
- How to know that kind of authentication is currently in use.
- How do I set the authentication in such a way that users on office network don't have to input user name\password? So if users are in the office they can just go straight in without using a password? Those outside the office will obviously still have to use the password.
Detail answer would be really great.
There are two build-in authentication types: windows and forms.
You can configure it in central administration (as far as I remember in "Application Management" section).
Windows authentication will use current user's windows credentials to login on site. So if SharePoint is configured with windows authentication and permissions were granted to user there will be no request to enter login/password. In other case (outside of office for example) site will ask for credentials.