SSO with Apache and mod_auth_cas

Here are some easy steps to archive SSO with cyn.in. I think it works with mod_auth_kerb as well - you just have to alter the login name variable.

1. Remove the version of the WebServerAuth plugin shipped with cyn.in from the "products" directory (It doesn't work with REMOTE_USER variables).
2. Download vanilla WebServerAuth from here: http://plone.org/products/webserverauth and put it in the "products" dir.
3. Re-run buildout.
4. Install WebServerAuth with portal_quickinstaller in Zope manager
5. Go to acl_users and edit web_server_auth: Alter the login name variable to "HTTP_CAS_USER"

Have fun.