File mod_auth_memcookie.conf of Package apache2-mod_auth_memcookie

<IfModule mod_auth_memcookie.c>
 <Location />
  # Name of the cookie to used for check authentification, set to
  # "AuthMemCookie" by default.
  # Default: AuthMemCookie
  Auth_memCookie_CookieName myauthcookie

  # List of ip or host adresse(s) and port(s) ':' separed of memcache(s) daemon
  # to be used, coma separed. 
  # Example; host1:12000,host2:12000
  # Default: 127.0.0.1:11211
  Auth_memCookie_Memcached_AddrPort 127.0.0.1:11000

  # The domain the cookie is valid for.
  # Default: none (means: all)
  # Auth_memCookie_CookieDomain .example.com

  # Session object stored in memcached expiry time, in seconds.  Used only if
  # "Auth_memCookie_Memcached_SessionObject_ExpiryReset" is set to on.
  # Default: 3600 (seconds)
  # Auth_memCookie_Memcached_SessionObject_ExpireTime 86400

  # Set to 'yes' to set session information to http header of the authenticated
  # users.
  # Default: no
  # Auth_memCookie_SetSessionHTTPHeader on

  # Set to 'yes' to mime64 encode session information to http header.
  # Default: off
  # Auth_memCookie_SetSessionHTTPHeaderEncode on

  # Session is created by doing a subrequest to the specfied URI and using the
  # returned headers (uses the configured SessionHeaders).
  # Default: none
  # Auth_memCookie_AuthentificationURI https://login.example.com/

  # Just run the authentification steps for the subrequest (data is taken from
  # the input headers in that case).
  # Default: off
  # Auth_memCookie_AuthentificationURIOnlyAuth on

  # Tell the module that it can take the user name from the specified header
  # when it creates the session. 
  # Default: none
  # Auth_memCookie_AuthentificationHeader X-Username

  # Specify which headers should be cleared from the input headers and taken
  # from the session data. 
  # Default: none
  # Auth_memCookie_SessionHeaders X-USERNAME,X-EMAIL,X-FIRSTNAME,X-LASTNAME
 
  # to redirect unauthorized user to the login page
  ErrorDocument 401 "/gestionuser/login.php"
 
  # to specify if the module are autoritative in this directory
  Auth_memCookie_Authoritative on
  # must be set without that the refuse authentification
  AuthType Cookie
  # must be set (apache mandatory) but not used by the module
  AuthName "My Login"
 </Location>

</IfModule>

# to protect juste user authentification
<Location "/myprotectedurl">
 require valid-user
</Location>

# to protect acces to user in group1
<Location "/myprotectedurlgroup1">
 require group group1
</Location>