Configuring IFD (Internet Facing Deployment) with Microsoft Dynamics CRM 2011
The CRM Team Blog has a handy blog entry (with video!) for users needing to enable IFD in CRM 2011. The process is a bit more complicated than previously, but it will probably be more secure as authentication is claims based and no longer forms based. Therefore you must install and configure a security token services and manage your certificates.
Here is the 23 minute long video to help you with this process: