The setup: Server 2003 R2, ISA 2006 SP1. Clients connect through proxy on the server and using IE7
Not all https sites but some (Facebook & Blogger.com) fail to show when you try to login to them. On the ISA logs after i query my connection, i get a message saying "12209 The ISA Server requires authorization to fulfill the request. Access to the Web Proxy filter is denied."
On the Client browser i just get a page cannot be displyed message. IE7 doesnt help much with diagnosis, however Google Chrome comes up with (Error 107 (net::ERR_SSL_PROTOCOL_ERROR): Unknown error.)
My instinct is to go with there being a client problem rather than an ISA problem as nothing has changed in ISA for the last year and there have been browser updates to the clients. I installed SP1 to ISA the other day with no change.
My understanding is that a request is sent to ISA, and ISA creates a secure tunnel to connect and the client then resends the request securely along the tunnel, however i fear that the client is not sending this request back.
I am maybe just missing something, however anymore advice would be helpful :)