The VPN gateway moon controls the access to the hosts alice and
venus by means of wildcard parameters that must match the subject
Distinguished Name contained in the peer's X.509 certificate. Access to
alice is granted for DNs containing a OU=Research field whereas venus
can only be reached with a DN containing OU=Accounting. The roadwarriors
carol and dave belong to the departments 'Research' and 'Accounting',
respectively. Therefore carol can access alice and dave
can reach venus.