TMG Server + IPAD2, Youtube(App) & App Store issue

[edugeekdan]

Hi All,

 

We've just rolled out a TMG 2010 server, It acts as a transparent proxy and all works fine for both HTTP sites and HTTPS.

 

The problem we are having is with the IPAD2:

 

Youtube App error: 'Cannot connect to YouTube' - Note: the actual YouTube site works fine, through safari

App Store error: 'Cannot connect to iTunes Store'

 

Im pretty sure both errors are related. After trawling the internet the nearest report & solution of this problem i can find is the following:

 

LINK: hxxp://xxw.google.com/support/forum/p/youtube/thread?tid=4cd50231e5fce253&hl=en

 

Which suggest to enable "Allow range requests through unmodified" on Watchguard equipment - Is there an ISA/TMG Equivalent setting?

 

Any help greatly appreciated.

 

Thanks

 

Dan