It can also be as simple as using AFS web pages to limit access to MSU only.

http://techbase.msu.edu/article.asp?id=683&service=techbase

From: Tim Heckaman [mailto:[log in to unmask]]
Sent: Monday, January 30, 2012 11:56 AM
To: [log in to unmask]
Subject: [MSUNAG] MSU Net Authenticator

Hello all,

I was hoping someone might know if it is possible for me to set up a website that uses the MSUNet ID authenticator. I’d like users to have to log in to the site to access it but I would only like it to be the MSU community.  Is this possible?

Thanks in advance.