[CentOS] squid proxy, https and apple store

Hi,

I'm a bit confused regarding the connection of a Mac OS X system to the app store by the app store client.

Squid is configured using ncsa_auth and I can access https and http websites without a problem.

But the app store app is not logging in. I do get

==> /var/log/squid/cache.log <== 2014/06/11 13:23:10| The request CONNECT p12-buy.itunes.apple.com:443 is DENIED, because it matched 'ncsa_users' 2014/06/11 13:23:10| The reply for CONNECT p12-buy.itunes.apple.com:443 is ALLOWED, because it matched 'ncsa_users' 2014/06/11 13:23:10| The request CONNECT p12-buy.itunes.apple.com:443 is ALLOWED, because it matched 'CONNECT'

in my squid logfile.

Any hints or suggestions? Regards . Götz