Index: trunk/packages/invirt-web/code/main.py
===================================================================
--- trunk/packages/invirt-web/code/main.py	(revision 1825)
+++ trunk/packages/invirt-web/code/main.py	(revision 1836)
@@ -682,5 +682,5 @@
     if environ.get('AUTH_TYPE') == 'Negotiate':
         # Convert the krb5 principal into a krb4 username
-        if not user.endswith('@%s' % config.authn[0].realm):
+        if not user.endswith('@%s' % config.kerberos.realm):
             return
         else: