This is a fascinating scenario of web filtering related to community/religious values. Is this a specific request from the Hutterite communities you serve?
Honestly, even if you block these services, individuals in the community who really do want to access content frowned upon by the community will probably find a way or an alternative through normal internet. If they are smart enough to use these services and SSL in what they do, they are probably smart enough to find a way to get what they want.
Unfortuantely, I can't think of anything to help you beyond what others have posted in this thread but keep us updated on this. Basically what Photon said is all that I can think of as well, find a list of the common IPs that these services use and block them. I'm sure there must be a commercial list of these somewhere as it's a hot commodity for websites seeking to restrict content to regional IPs. This is an interesting situation.
Last edited by Hack&Lube; 08-05-2010 at 03:34 PM.
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