Options +Indexes
<IFDefine !SECURE>
RedirectMatch (.*)$ https://www.cs.unc.edu$1
</IFDefine>

<IFDefine SECURE>
AuthName 'Computer Science Login:'
AuthType Kerberos
Satisfy any
order deny,allow
deny from all
allow from .cs.unc.edu
require valid-user
</IFDefine>