How do I set up mod_auth_cas for a VirtualHost?

Question

I have the following in /etc/apache2/httpd.conf:

Include /private/etc/apache2/passenger_pane_vhosts/*.conf

I have the following in /etc/apache2/passenger_pane_vhosts/my_site.conf:

LoadModule auth_cas_module /usr/libexec/apache2/mod_auth_cas.so
CASCookiePath /tmp/mod_auth_cas/
CASVersion 2
CASDebug on
CASValidateServer off
CASAllowWildcardCert on
CASTimeout 86400
CASIdleTimeout 7200
CASLoginURL https://cas.mycompany.com/cas/login
CASValidateURL https://cas.mycompany.com/cas/serviceValidate
CASCookieDomain hattip-dev.mitre.org

LogLevel debug

<VirtualHost *:80>
  LogLevel debug
  ServerName hattip.local
  DocumentRoot "/path/to/rails_app/public"
  RailsEnv development
  <Location />
    AuthType CAS
    AuthName "MyCompany CAS"
    CASAuthNHeader MOD_AUTH_CAS_USER
    require valid-user
  </Location>
  <directory "/path/to/rails_app/public">
    Order allow,deny
    Allow from all
  </directory>
</VirtualHost>

Apache will start fine, but every request to my Rails application returns a 403 without redirecting to my CAS server. There is no CAS-related information in the logs, even though CASDebug is on and LogLevel is debug everywhere I can think to set it.

PS: I've tried a few variations of the above configuration, including putting the mod_auth_cas declarations inside the <VirtualHost> definition, but most fail on startup. I've also tried deleting the <Location> block and moving that authentication into the <Directory> block: no change.

Does anyone know how I can get mod_auth_cas to actually redirect to my CAS server?

(Moved from StackOverflow)

Solution

Got it. The answer was to combine the <Location> and <Directory> blocks and add a Satisfy directive:

LoadModule auth_cas_module /usr/libexec/apache2/mod_auth_cas.so
CASCookiePath /tmp/mod_auth_cas/
CASVersion 2
CASDebug on
CASValidateServer off
CASAllowWildcardCert on
CASTimeout 86400
CASIdleTimeout 7200

LogLevel debug

<VirtualHost *:80>
  CASCookieDomain "myapp"
  CASLoginURL "https://cas.mycompany.com/cas/login"
  CASValidateURL "https://cas.mycompany.com/cas/serviceValidate"
  LogLevel debug
  ServerName "myapp"
  DocumentRoot "/path/to/rails_app/public"
  RailsEnv development
  <Location />
    Order deny,allow
    Deny from all
    AuthType CAS
    AuthName "MyCompany CAS"
    require valid-user
    Satisfy Any
  </Location>
</VirtualHost>