title: WCF ClientCredentials
body: <p>please help. Half of the kingdom for a correct answer!!!
  Is it possible to use WCF Windows authentication with the anonymous access option? My WCF service deployed in the AD domain, and there are some clients outside of the  domain. Can I use windows authentication to get client credentials for users that are in the AD and the same time allow access to the users they are not in the domain?  Thanks.
  P.S. Sorry for poor English.</p>